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)