OPINION ON MOTION FOR REHEARING
We grant Petitioner’s motion for rehearing and issue the following opinion. Jimmie Anderson retained attorney Walter Snider to represent her in her divorce and child custody action. Due to alleged acts and omissions in the course of this representation, Anderson filed suit against Snider asserting claims of legal malpractice, breach of contract and violations of the Deceptive Trade Practices-Consumer Protection Act. Anderson, who is not an attorney, is proceeding pro se. Snider filed a motion for summary judgment supported by his affidavit as an expert witness, which stated, in part:
I have reviewed the Plaintiff’s Original Petition, my file and the relevant and material documents filed with the Court, and it is clear that I acted properly and in the best interest of Mrs. Jimmie F. Anderson when I represented her, and that I have not violated the [DTPA], I did not breach my contract with Mrs. Jimmie F. Anderson, and have not been guilty of any negligence or malpractice. Mrs. Jimmie F. Anderson has suffered no damages or legal injury as a result of my representation of her.
Anderson argues that the evidence contained in Snider’s affidavit is incompetent to support the rendition of summary judgment as a matter of law because it is composed entirely of legal conclusions. Anderson raised this argument to the trial court by way of her supplemental motion for new trial. This court has repeatedly reversed the rendition of a summary judgment when it found that the proof upon which the judgment rested was incompetent as a matter of law.
See, e.g., Mercer v. Daoran Corp.,
A motion for summary judgment is properly granted only if the motion and its supporting affidavits show that the movant is entitled to judgment as a matter of law.
Mayo v. John Hancock Mutual Life Insurance Co.,
A movant’s right to summary judgment can be proved solely on the uncontro-verted testimony of an expert witness if the subject matter is such that a trier of fact would be “guided solely by the opinion testimony of experts, if the evidence is clear, positive and direct, otherwise credible and free from contradictions and inconsistencies, and could have been readily controverted.” Tex.R.Civ.P. 166a(c). The affidavit of an interested expert witness can support summary judgment if it meets the requirements of Rule 166a, even if that expert is a party to the suit.
See, e.g., Shook v. Herman,
If an interested expert witness presents legally sufficient evidence in support of a motion for summary judgment, the opposing party must produce other expert testimony to controvert the claims.
Fitzgerald v. Caterpillar Tractor Co.,
In the instant cause, the court of appeals determined that Snider’s expert testimony disproved the element of causation essential to Anderson’s claims. However, the evidence does not include the legal basis or reasoning for Snider’s opinion that he did not commit malpractice, violate the DTPA or breach his contract with Anderson. Without this information, Snider’s affidavit is simply a sworn denial of Anderson’s claims. We hold that the court of appeals erred in upholding the summary judgment because Snider’s testimony is wholly conclusory, rendering it incompetent to support summary judgment as a matter of law. 1
Notes
. As we are disposing of the cause on this ground, we do not address Anderson's argument that the trial court erred in rendering a summary judgment based only on the opinion of an
