DraftKings Inc. was sued by the National Football League Players Association and National Football League Players Inc. in New York federal court Monday in a breach-of-contract action over its stance of avoiding payment on the licensing of nonfungible tokens.

Co-executive chair Jeffrey Kessler and partners Dave Greenspan and George Mastoris at Winston & Strawn represent the NFLPA and the NFLPA Licensors in their lawsuit against DraftKings, which generates billions in revenue based on a simple premise: “If a DraftKings’ customer places a losing bet, that customer must still pay up.”