Fox filed the suit last week to New York's Judicial Arbitration and Mediation Services (JAMS), a company spokesperson confirmed. "Fox Corporation has filed suit against Flutter to enforce its rights to acquire an 18.6% ownership interest in FanDuel Group — an American sports betting brand — for the same price that Flutter paid for that interest in December 2020," a Fox spokesperson said in a statement given to CNBC. "The suit was filed as an arbitration before JAMS in New York, NY by consent of the parties." Flutter is considering taking FanDuel public -- as first reported by CNBC last month -- as the sports betting market is on the verge of exploding, with 19 states set to vote on mobile legalization this year. U.S. sports betting led to $30 billion in gross gaming revenue in 2020, according to The Action Network, a sports gambling news and analysis company.