Only months after sports gambling was legalized in the state, one of the world’s largest sports bookmakers has filed a lawsuit against a competitor in New Jersey federal court, accusing it of copyright infringement.

William Hill plc, based in London, filed the lawsuit against FanDuel, based in New York, in U.S. District Court in New Jersey on Oct. 23, accusing FanDuel of misappropriating language used in William Hill betting guides for its own instructional guides.