The group said it met with more than 250 players—women and men, and a majority of the top 20 in the WTA and ATP rankings—before going to court.
Why did Novak Djokovic's players' association sue the groups that run tennis, and what do they want?
The PTPA called the women's and men's tours, the ITF and the ITIA a "cartel, while the four major events—Wimbledon, US Open, French Open and Australian Open—were classed as "co-conspirators".
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