Newcastle United's former owner Mike Ashley is seeking an injunction against the club in row over its football kits.
The retail tycoon, who owns Sports Direct, says the club is "abusing" its dominant market position by refusing to allow the company to sell replica shirts.
Rival company JD Sports has been granted exclusive rights to sell the kits in a move that effectively cuts out Sports Direct, claim documents suggest.
The BBC has contacted Newcastle United for a response to the Competition Appeal Tribunal claim, which also asks for damages to be paid.
The claim, submitted by Sportsdirect.