Wimbledon ball boys and ball girls go through a rigorous training program that starts in January. The training lasts two and a half hours a week until Wimbledon begins in June. (Evening Standard)

Bad luck continues for Juan Martin Del Potro. He joins a long list of top players skipping the Tokyo Olympics (Twitter)

ITF lifted Dayana Yastremska’s doping ban after accepting her explanation of how the banned substance mesterolone entered her system (Eurosport)

Rafael Nadal skipped Wimbledon but plans to play at the Rogers Cup, at Cincinnati, and at the US Open (Tennis.com)

Ons Jabeur becomes the first Arab woman to win a WTA title (WTA)

Kiki Bertens, former world number 4, will retire later this year. She has been struggling recently with injuries. (Reuters)

Western and Southern Open in Cincinnati expects to have spectators at full capacity. Tennis is returning to normality. (Wsopen.com)

US Open is the latest tournament to get rid of line judges and go with electronic line calling. Some are concerned that tennis is being turned into an esport. Where will the next generation of chair umpires come from since line judges can’t be promoted? (Yahoo Sports)

Novak Djokovic and Rafael Nadal may break Roger Federer’s records. But the Federer brand is a money-making juggernaut. Federer made $84 million in the last 12 months despite playing almost no tennis. Djokovic earned $33 million. Naomi Osaka made $55 million, $22 million than Djokovic. Ouch. (TFS)

Naomi Osaka will skip post-match press conferences at Roland Garros. Osaka cited mental health as the reason for her decision. (USA Today)

The new men’s tennis association floated by Novak Djokovic and Vasek Pospisil struggles to get traction (New York Times)

GQ talks to Roger Federer about tennis, retirement, and becoming the tourism ambassador for Switzerland (GQ)

Carla Suarez Navarro beats cancer. She will play Roland Garros for the last time. (BBC)