James Ciomber sued Cooperative Plus, Inc., alleging that the company was responsible for an explosion fueled by lique-fled-petroleum (LP) gas that injured him and damaged his house. After the district court excluded the testimony of Ciomber’s expert witness, see Fed.R.Civ.P. 37(c)(1), and disregarded Ciomber’s statement of proposed material facts, see Loc. R. 56.1(b) (N.D.Ill.), it granted Cooperative Plus summary judgment because he proffered no evidence showing that the company caused the explosion. We affirm.
I. History
In the middle of the night on November 18, 2001, Ciomber’s house in Poplar Grove, Illinois, exploded. The building was mostly leveled, and those areas that were not leveled caught fire. Ciomber, who was in the house at the time, suffered severe injuries as a result, but amazingly (and thankfully) survived.
In November 2003, Ciomber filed suit in Illinois state court against Cooperative Plus, the company that provided LP-gas for his house, alleging that the company negligently caused the destruction of his *638 house and his resulting injuries. Ciomber claimed that although he repeatedly reported to the company the existence of an LP-gas leak in his basement, the company did not take appropriate steps to repair the leak. He continued that, because Cooperative Plus breached its duty to fix the leak, LP-gas accumulated in his basement “in such a volume and in such a concentration so as to be susceptible to ignition by an unknown source.” As Ciomber concluded in paragraph 12 of his complaint, the explosion and his injuries were “direct and proximate result[s] of the breaches of the duties” Cooperative Plus owed to him. Cooperative Plus denied Ciomber’s numerous allegations in its answer; as relevant here, the company denied that Ciomber “was injured in the manner or to the extent claimed” in paragraph 12, and “further denie[d] the remaining allegations contained in [that paragraph].”
Shortly after Cooperative Plus filed its answer, the company successfully removed the action to federal district court on the basis of diversity jurisdiction. See 28 U.S.C. §§ 1332, 1441. Discovery commenced in May 2004. Although the court initially ordered discovery to cease in December 2004, it continued well into 2006 because, among other reasons, Ciomber’s attorneys — husband and wife Karl Szy-manski and Cynthia Szymanski Koroll— made numerous motions for extensions of discovery deadlines. We need not recount the reasons underlying those motions, but what is pertinent is that, between May 2005 and September 2005, counsel moved five times to extend discovery deadlines, including the date by which they needed to disclose Ciomber’s expert-witness report. See Fed.R.Civ.P. 26(a)(2). After Mr. Szy-manski brought the fifth of these motions in September, the court warned him that, although it would grant the motion, he would have no more additional time to disclose the report; the court then stated that Mr. Szymanski had until October 31, and set a status hearing for November 2 to address other unresolved discovery matters.
Ciomber’s attorneys disclosed the Rule 26(a)(2) report of his expert witness, Kim Mniszewski, on November 1, one day after the October 31 deadline. In the “report,” Mniszewski merely provided eight terse statements concluding that Cooperative Plus was responsible for the destruction of Ciomber’s house; the grounds for his conclusions were, in most instances, even more laconic. For example, Mniszewski concluded that “[t]he cause of the explosion is [sic] a buildup of [LP] gas from failed [sic] pipe connection in the basement area.” Mniszewski “explained” that his conclusion was based on “inspection, analysis.” Mniszewski also provided vague references to documents that he purportedly reviewed before forming his conclusions: (1) a county sheriffs report; (2) “[v]arious deposition transcripts and corresponding exhibits”; (3) the National Fire Protection Association’s National Fuel Gas Code and LP Gas Code; and (4) National Propane Gas Association “documents.”
Ciomber’s attorneys also filed on November 1 another motion for more time to disclose the report; in the motion, counsel implied that the report, as disclosed, was incomplete, and stated that Mr. Szymanski was unable to disclose a completed report because he was hospitalized. The district court addressed the motion at the November 2 status hearing. Ms. Szymanski Ko-roll appeared at the hearing on behalf of Ciomber, and explained that Mr. Szyman-ski suffered a heart attack on October 30, which was why they were late in disclosing Mniszewski’s report. Ms. Szymanski Ko-roll further stated that the disclosed report was “still not what [she] want[ed],” and asked for seven days to disclose an amended report. The court readily granted Ms. *639 SzymansM Koroll’s request; however, the amended report that she promised was never disclosed.
Nearly three months later, Cooperative Plus filed two motions, one asking the district court to exclude Mniszewski’s testimony, and another seeking summary judgment. Cooperative Plus contended that, because Mniszewski’s report did not comply with Rule 26(a)(2)’s requirements, Ciomber should be prohibited from introducing Mniszewski’s testimony in support of his negligence claim. See Fed.R.Civ.P. 37(c)(1). Cooperative Plus also asserted that without Mniszewski’s testimony, Ci-omber could not establish that the company’s negligence caused the destruction of his house. Specifically, the company pointed to Ciomber’s deposition testimony, in which he admitted that on the day before the explosion he moved his LP-gas-fueled dryer away from the dryer’s LP line, and that the dryer did not operate after he moved it. Cooperative Plus therefore argued that, without Mniszew-ski’s testimony countering Ciomber’s admissions, Ciomber could not show that the company’s negligence caused the LP-gas leak that led to the explosion.
The district court took Cooperative Plus’s motions under advisement and instructed the parties to proceed with deposing Mniszewski. In addition to elaborating on his report, Mniszewski testified that Mr. Szymanski did not ask him to prepare the report until October 25, 2005 — less than a week before the district court’s final deadline for the report’s disclosure. Mniszewski further stated that no one assisted him when drafting the report, and that he did not submit the report to anyone for review or comment before it was disclosed.
The parties deposed Mniszewski twice over a month-long period, and during that time Ciomber responded to Cooperative Plus’s motion for summary judgment. As part of his filing, Ciomber submitted a response to Cooperative Plus’s proposed material facts, as required by Loc. R. 56.1(b). But instead of presenting both a response to Cooperative Plus’s statement of proposed facts and a separate statement of his own proposed facts, Ciomber commingled the two statements to create an argumentative response to Cooperative Plus’s filing.
Not long after briefing completed, the district court granted both Cooperative Plus’s motion to exclude Mniszewski’s testimony and its motion for summary judgment. In a consolidated order, the court excluded Mniszewski’s deposition testimony, concluding that Ciomber “offered no justification for his failure to provide a complete expert report in a timely fashion.” The court then stated that it would disregard the facts Ciomber presented in his Rule 56.1 response because the filing did not comply with Loc. R. 56.1(b). With no admissible expert testimony and no suitable statement of proposed facts, the court stated, Ciomber proffered no evidence to rebut Cooperative Plus’s evidence showing that Ciomber caused an LP-gas leak when he moved his dryer, and that his house was destroyed when the lealdng gas ignited. The court therefore concluded that there was no material dispute regarding the issue of causation, and granted summary judgment for Cooperative Plus.
II. Analysis
Ciomber and Cooperative Plus do not dispute that Ciomber’s negligence claim is governed by Illinois law. And under Illinois law, Ciomber needed to establish that (1) Cooperative Plus owed a duty of care to him as his LP-gas provider; (2) the company breached that duty; and (3) the company’s breach caused his inju-
*640
ríes and the destruction of his house.
1
See Adams v. N. Ill. Gas. Co.,
Ciomber contends that the district court was wrong for two reasons. First, he argues that he could have proven causation had the court not erroneously excluded Mniszewski’s deposition testimony, or incorrectly disregarded his Rule 56.1 response. Ciomber also argues that, in any event, Cooperative Plus had conceded the element of causation in several state-court pleadings.
When addressing Ciomber’s arguments, we will first examine whether the district court abused its discretion when it excluded Mniszewski’s testimony and disregarded Ciomber’s Rule 56.1 response.
See Koszola v. Bd. of Educ.,
If Ciomber cannot show that the district court erred with regard to his Rule 56.1
*641
response, Mniszewski’s deposition testimony, or Cooperative Plus’s state-court pleadings, then the court’s grant of summary judgment must stand. The expert testimony, Rule 56.1 response, and purported admissions constituted the entirety of Ciomber’s proffer as to the element of causation, and if the district court properly excluded them then Ciomber had no other way to dispute the company’s evidence showing that he caused the explosion by rupturing his dryer’s LP-gas line. Ciom-ber would thus be unable to show that a disputed material fact exists regarding the essential element of causation, and we would have to conclude that the district court properly granted summary judgment for Cooperative Plus.
See Celotex Corp.,
A The district court’s exclusion of Ci-omber’s proffered evidence of causation
We begin with Ciomber’s challenge to the district court’s decision to exclude Mniszewski’s deposition testimony. Under Rule 26(a)(2), a party that intends to rely upon an expert witness’s testimony is required to furnish by a date set by the district court a report containing, among other information, “a complete statement of all opinions” the retained expert will provide, “and the basis and reasons for them.” Fed.R.Civ.P. 26(a)(2)(B)(I), (a)(2)(C);
see also Jenkins v. Bartlett,
Ciomber does not challenge the court’s conclusion that Mniszewski’s report failed to comply with Rule 26(a)(2); he thus waives the point.
See Williams v. REP Corp.,
Ciomber instead contends that the expert report’s deficiencies were harmless. Specifically, he asserts that Cooperative Plus cannot claim that it was prejudiced by the report because the company knew that Mniszewski was going to be an expert witness before it received his report.
See David,
Ciomber’s arguments fail. Contrary to Ciomber’s belief, it makes little difference that Cooperative Plus knew that Mniszewski was his expert witness before he disclosed the report. Rule 26(a)(2) mandates a complete and detailed report of the expert witness’s opinions, conclusions, and the basis and reasons for them,
see
Fed.R.Civ.P. 26(a)(2)(B)(i), and not merely the expert witness’s identity. Indeed, Rule 26(a)(2) makes it clear that the expert witness’s identity is a separate fact that must be disclosed in addition to the report.
See
Fed.R.Civ.P. 26(a)(2)(B) (stating that disclosure of expert witness’s identity “must be accompanied” by the expert report);
Musser,
Moreover, Rule 26(a)(2) does not allow parties to cure deficient expert reports by supplementing them with later deposition testimony. The purpose of Rule 26(a)(2) is to provide notice to opposing counsel — before the deposition — as to what the expert witness will testify,
see Sherrod v. Lingle,
Equally meritless is Ciomber’s assertion that the deficient report was due to his attorney’s medical emergency. It truly is unfortunate that Mr. Szymanski suffered a heart attack on the eve of the deadline for the disclosure of Mniszewski’s expert report, and we are happy to see that he appears to have made a full recovery. Nevertheless, Mr. Szymanski’s medical emergency does not explain why he waited to ask Mniszewski to compose the report a mere six days before the deadline, a fact that helps explain why Mniszewski’s conclusions and reasoning were so cursory. Given that Mniszewski drafted the report without any help or input from Mr. Szy-manski, the emergency also does not explain why the report was deficient. The emergency likewise does not explain why Ms. Szymanski Koroll did not disclose an amended expert report after the district court rightly granted her request for time to do so. Despite Ms. Szymanski Koroll’s assurances, no amended expert report was ever disclosed, even though Cooperative Plus highlighted the report’s deficiencies— three months after it was disclosed — in its motion to exclude Mniszewski’s testimony.
See id.
(“Disclosures must not be used as a means to extend a discovery deadline.”);
cf. Musser,
*643
Indeed, based on the record before us, we agree with the district court that the fact that Mniszewski’s expert report was deficient was not harmless. Because of the report’s deficiencies, Cooperative Plus was forced to depose Mniszewski with little or no understanding as to what he would testify.
See Sherrod,
Nor did the district court abuse its discretion by refusing to consider Ciom-ber’s Rule 56.1 response. Rule 56.1 requires a party seeking summary judgment to include with his motion “a statement of material facts as to which the ... party contends there is no genuine issue and that entitle the ... party to a judgment as a matter of law.” Loc. R. 56.1(a)(3). The party opposing summary judgment must then respond to the movant’s statement of proposed material facts; that response must contain both “a response to each numbered paragraph in the moving party’s statement,” Loc. R. 56.1(b)(3)(B), and a separate statement “consisting of short numbered paragraphs[] of any additional facts that require the denial of summary judgment,” Loc. R. 56.1(b)(3)(C). District courts are “ ‘entitled to expect strict compliance’ ” with Rule 56.1,
Cichon v. Exelon Generation Co., L.L.C.,
Here, the district court refused to consider the facts proposed in Ciomber’s Rule 56.1 response after concluding that he did not separate his proposed facts from his responses to Cooperative Plus’s proposed material facts. As the court explained,
*644
Ciomber’s response contained only “lengthy recitations of additional facts in his responses to [Cooperative Plus’s] statement of material facts.” Ciomber does not contest the court’s characterization of his Rule 56.1 response, and our own review of his response confirms the court’s findings. Ciomber’s response contained several extremely long, argumentative paragraphs, and in those paragraphs he simultaneously denied the veracity of Cooperative Plus’s proposed material facts and presented additional facts of his own. And because Ciomber’s response did not comply with Loc. R. 56.1(b)(3)(B) and (b)(3)(C), the district court did not err by refusing to consider the facts he proposed.
See Cichon,
B. Cooperative Plus’s purported admissions in state-court pleadings
Ciomber also makes a multi-facet-ed argument that the district court overlooked Cooperative Plus’s numerous admissions of causation in various state-court pleadings.
See Murrey v. United States,
Ciomber’s argument is essentially a challenge to the sufficiency of Cooperative Plus’s state-court pleadings. Normally, we are guided by the Federal Rules of Civil Procedure when addressing the sufficiency of pleadings,
see
Fed.R.Civ.P. 1, 8(b), but because Ciomber’s complaint and Cooperative Plus’s answer were filed in Illinois state court before this action was removed, we must apply Illinois’s standards,
see
Fed.R.Civ.P. 81(c)(1),
Romo v. Gulf Stream Coach, Inc.,
As Ciomber points out, the Civil Practice Law requires a defendant’s answer to “contain an explicit admission or denial or each allegation” presented in a complaint, and further states that every allegation that is “not explicitly denied is admitted.” 735 Ill. Comp. Stat. 5/2-610(b);
see also Parrish v. Hackman (In re Estate of Andernovics),
Applying the Illinois Supreme Court Rules to Cooperative Plus’s answer, it is apparent that Ciomber’s contention is unavailing. Cooperative Plus clearly abided by the Supreme Court Rules when denying Ciomber’s “remaining allegations contained in paragraph 12,” which included the allegation of causation.
See
Ill. Sup. Ct. R. 136;
Kirk,
Not to be deterred, Ciomber further contends that Cooperative Plus also affirmatively admitted causation in its answer and other pleadings by agreeing that: (1) “on November 18, 2001, LP-gas leaked out and into [Ciomber’s] residence in such a volume and concentration which did explode”; (2) Ciomber detected the scent of LP-gas up to a year before November 18 and reported the scent to Cooperative Plus; (3) Cooperative Plus replaced certain LP-gas accessories in Ciomber’s house in response to his reports of LP-gas leaks; and (4) the explosion could have been prevented by turning off the flow of LP-gas into the home. In other words, Ciomber argues that Cooperative Plus admitted to causing the explosion by agreeing that it supplied him LP-gas, that it was aware of a recurring LP-gas leak, that it addressed that leak, and that the explosion could have been prevented.
Contrary to Ciomber’s interpretation of Cooperative Plus’s statements, the company did not admit that it caused the LP-gas leak and the subsequent explosion; it merely agreed that there was a leak and an explosion. At most, Cooperative Plus’s admissions might pertain to whether the company had a duty to Ciomber and whether it breached that duty.
See Adams,
III. Conclusion
The district court did not err either by excluding Mniszewski’s deposition testimony or by disregarding Ciomber’s Rule 56.1 response. And Cooperative Plus did not
*646
concede causation in its state-court pleadings. Ciomber thus can point to no admissions or evidence establishing the element of causation of his negligence claim, much less disputing Cooperative Plus’s evidence showing that he caused the explosion by rupturing his dryer’s LP-gas line. The district court accordingly did not err in granting summary judgment for Cooperative Plus.
See Cady,
Affirmed.
Notes
. For clarity’s sake, we will slightly alter the terminology used by Illinois courts when we discuss the elements of Ciomber’s negligence action. Instead of saying that Ciomber needed to prove that Cooperative Plus “proximately caused” the explosion of his house (as Illinois courts would,
see, e.g., Adams,
. Cooperative Plus asserts Ciomber’s failure to point to admissible expert-witness testimony alone dooms his appeal. Specifically, Cooperative Plus contends that Ciomber can prove causation only with expert testimony, and because Mniszewski’s testimony was correctly excluded, we must uphold the district court’s grant of summary judgment. In making its argument, Cooperative Plus, relies on two cases in which Illinois state courts concluded that an explosion does not create a presumption of negligence.
See John Morris Co. v. Southworth,
