Eureka Urethane, Inc. appeals from summary judgment entered by the district court 1 rejecting its seven claims based on sections 1 and 2 of the Sherman Antitrust Act, 15 U.S.C.A. §§ 1, 2 (West Supp. 1991), because PBA, Inc., and the Professional Bowlers Association of America refused to approve Eureka’s “Bud Ball” for use in televised bowling tournaments. 746 F.Supp. 915. In addition, the court dismissed for lack of subject matter jurisdiction a pendent state law claim based on tortious interference with business relationships. The case has been exhaustively briefed by the parties and oral arguments heard. We are not persuaded that the district court made any error of law in its thorough and carefully researched opinion. We affirm on the basis of the district court’s opinion. See 8th Cir.R. 47B.