This аppeal arises out of a private antitrust action brought in federal district court by appellees Vincent Abbey and Eldred Barnes, owners of the Seattle Totems, an ice hockey team in the now-defunct Western Hockey League. Named as defendants wеre the National Hockey League (NHL), Northwest Sports, owners of the Vancouver Canucks of the NHL, and various League officers and club owners. The suit charges defendants with unlawful monopolization of the ice hockey industry in North America and seeks, among other relief, to have certain agreements between Abbey and Barnes and Northwest Sports relating to the sale and management of the Seattle Totems declared void and unenforceable. 1
Approximately twenty-seven months after the filing of the antitrust action, Northwest Sports sued Abbey and Barnes in British Columbia Supreme Court for damages for breach of the same agreements that are being challenged as illegal and unenforceable in the appellees’ antitrust action in federal district court. Abbey and Barnes then mоved in the federal court action to enjoin Northwest Sports from prosecuting its contract claim in British Columbia on the ground that the claim constitutes a compulsory counterclaim to plaintiffs’ antitrust complaint and must be pleaded in the pending federal antitrust аction in Washington. The district court granted plaintiffs’ motion and issued the injunction against prosecution of the Canadian suit. Northwest Sports appeals pursuant to 28 U.S.C. § 1292(a)(1).
I.
Northwest Sports does not deny that under Federal Rule of Civil Procedure 13(a) its contract claim would constitute a compulsory counterclaim in the pending antitrust action. Rather, it contends that Canadian law, and not Rule 13(a), governs the determination whether the contract claim is compulsory and that Canadian law would not require Northwest Sports to plead its сlaim as a compulsory counterclaim in the pending antitrust suit. In concluding that Rule 13(a) governs, the district court below relied on the general choice of law principle, restated in § 122 of the Restatement (Second) of Conflict of Laws (1971), that a court will apply its оwn rules of procedure to regulate the conduct of litigation before it.
2
See also Bournias v. Atlantic Maritime Co.,
The issue before this court is not whether Canadian law governs the interpretation or the validity of the agreements between Northwest Sports and appellees, but rather whether all clаims arising out of these agreements should be heard in a single forum. A determination that appellant’s claim is a compulsory counterclaim which must be pleaded in the district court of Washington cannot reasonably be expected to affect the merits of appellant’s contract claim.
3
Moreover, the Supreme Court has emphasized the federal courts’ overriding interest in applying their own rules of procedure and has indicated that in federal court the Federal Rules of Civil Procedure will almost invariably bе applied if there is a Federal Rule governing the point in dispute.
See Hanna v. Plumer,
Northwest Sports nevertheless argues that Canadian law is contrоlling because (1) the parties designated Canadian law as the law to be applied to the contract, and (2) Canada is the jurisdiction with the most significant relationship to the transaction. However, as noted above, the controlling choice of law prinсiple is that a court’s own local rules will be applied to determine how litigation shall be' conducted. Appellants have failed to demonstrate why this principle is inapplicable in this case. Accordingly, we conclude that the district court properly looked to Fed.R.Civ.P. 13, and not Canadian law, to determine whether a defendant’s contract claim must be pleaded as a compulsory counterclaim in the federal antitrust action pending before it.
II.
Federal Rule of Civil Procedure 13(a) requires a defendant in federal court to state as a counterclaim any claim he may have against the plaintiff that “arises out of the transaction or occurrence that is the subject matter” of the plaintiff's claim.
4
The purpose of requiring a defendant to assert his clаim as a counterclaim in a pending action is “to prevent multiplicity of actions and to achieve resolution in a single lawsuit of all disputes arising out of common matters.”
Southern Construction Co. v. Pickard,
A federal distriсt court with jurisdiction over the parties has the power to enjoin them from proceeding with an action in the courts of a foreign country, although the power should be “used sparingly.”
Philp v. Macri,
In re Unterweser Reederei Gmbh,
*856
Similarly, in
Bethell v. Peace,
In the case before us, the validity of the 1972 — 74 agreements will be a central issue in both the Canadian and American litiga-tions. Adjudicating this issue in two separate actions is likely to result in unnecessary delay and substantial inconvenience and expense to the parties and witnesses. Moreover, separate adjudications could result in inconsistent rulings or even a race to judgment.
In granting the injunction against Northwest Sports, the district court noted that it had considered the relеvant factors, including “the convenience to the parties and witnesses, the interest of the courts in promoting the efficient administration of justice, and the potential prejudice to one party or the other,” and concluded that the equitable balance weighs heavily in favor of plaintiffs, Abbey and Barnes. It also concluded that the policies animating Rule 13(a) and the rationale of the cases upholding injunctions against subsequently-filed federal court actions applied with equal force to this case where the cоmpulsory counterclaim was brought in the courts of Canada. In view of these policies and cases, we cannot say that the district court abused its discretion by enjoining Northwest Sports from prosecuting its contract claim in Canadian court.
AFFIRMED.
Notes
. The agreements called for Abbey and Barnes to sell to Northwest Sports 55% of the Totems and to pay Northwest Sports 44.44% of all moneys expended by Northwest Sports in the operation of the Totems franchise. The agreements also called for Abbey and Barnes to repurchase аll the shares held by Northwest Sports in the Totems if the NHL granted the Totems an NHL franchise.
The agreements were executed in Vancouver, and paragraph 18 of the agreement which Abbey and Barnes allegedly breached provided that “[t]his agreement shall be interрreted in accordance with the laws of the Province of British Columbia.”
. Restatement (Second) of Conflict of Laws § 122 (1971) states:
A court usually applies its own local law rules prescribing how litigation shall be conducted even when it applies the local law rules of another state to resolve other issues in the case.
. Nor, we might add, do we perceive any unfairness to Northwest Sports in applying the Federal Rules to the question before us. While the parties apparently expected the contract to be interpreted in accordance with the laws of British Columbia, it is not reasonable to assume that the parties expected Canadian law to be applied to the procedural question whether an action for breach of the contract would be а compulsory counterclaim in a pending antitrust suit in a United States district court. See Restatement (Second) of Conflicts of Laws § 122, Comment a (1971).
. Fed.R.Civ.P. 13(a) provides:
“A pleading shall state as a counterclaim any claim which at the time of serving the pleading the pleader has against any opposing party, if it arises out of the transaction or occurrence that is the subject matter of the opposing party’s claim and does not require for its adjudication the presence of third parties of whom the court cannot acquire jurisdiction. But the pleader need not state the claim if (1) at the time the action was commenced the claim was the subject of another pending action. .. . ”
. The Anti-Injunction Statute, 28 U.S.C. § 2283, removes from the federal courts the equitable power to grant injunctions to stay state court proceedings “except as expressly authorized by Act of Congress or where necessary in aid of its jurisdiction or to protect or effectuate its judgments.” Rule 13(a) has been held not to create an express statutory exception to the prosсriptions of § 2283 and, accordingly, a federal court is barred by § 2283 from enjoining a party from proceeding in state court on a claim that should have been pleaded as a compulsory counterclaim in a prior federal suit.
See e. g., Nolen v. Hammet Co., Inc.,
. In re Unterweser Reederei, Gmbh, supra, arose as the result of a towing accident in which a drilling barge owned by the Zapata Off-Shore Company (Zapata) was damaged while being towed by a tug owned by Unter-weser Reederei (Unterweser). Both Zapata and Unterweser brought suit in federal district court in Florida: Zapata, for damages to his barge, Unterweser, for an exoneration and limitation of liability arising from the mishap and, by way of counterclaim, for moneys owed under the towage contract. Unterweser also brought аn action under the contract in the High Court of Justice. This action enjoined by the district court, and the Fifth Circuit affirmed.
In
Bremen v. Zapata
Off-Shore
Co.,
