The tennis players' association co-founded by Novak Djokovic has sued the main groups that run the sport in a bid to gain more money and control.

The tennis players’ association that was co-founded by Novak Djokovic has filed multiple lawsuits around the world against the sport’s tours and governing bodies.

Calling the groups in charge of professional tennis “a cartel,” the players' association co-founded by Novak Djokovic filed an antitrust lawsuit against the women's and men's tours, the International Tennis Federation and the sport's integrity agency on Tuesday in federal court in New York.