Novak Djokovic’s players’ association sued the groups that run tennis. Why and what do they want?

Ons Jabeur is a three-time Grand Slam finalist with more than $13 million in prize money by age 30, and as she looked out at the main court used for the Miami Open this week and next, she rattled off a lengthy list of things she thinks could be fixed in professional tennis to help all players.

“We need to improve the structure that we have. ... We can do better about the scheduling. The times of matches. There are a lot of tournaments, and health-wise, for the players, I don’t think that helps. The balls changing every week is not a good thing. Players deserve to be paid better,” said Jabeur, a member of the executive committee of the Professional Tennis Players’ Association, a group co-founded by Novak Djokovic several years ago. “Definitely a lot of things to work on.”