Novak Djokovic, a long-time advocate for players' rights, weighed in on the move from the organization he co-founded with other players. While the Serbian legend acknowledged the lawsuit’s intent, he also expressed some reservations about the letter.

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 agency.

PTPA co-founder Novak Djokovic declined to be named in a suit accusing tennis' governing bodies and Grand Slams of ‘abusing their power.'