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.

The players’ association co-founded by Novak Djokovic has filed an antitrust lawsuit against the women’s and men’s professional tours, the International Tennis Federation and the sport’s integrity age

The lawsuit seeks a jury trial and wants players to gain access to more earnings, arguing that the governing bodies that oversee the four Grand Slam tournaments and other professional events “cap the prize money tournaments award and limit players’ ability to earn money off the court.