The trajectory of Aryna Sabalenka’s season changed in late June, with an ache in her shoulder. Wimbledon was fast approaching, and she hadn’t been able to serve or hit overheads without intense pain for days. Could she swallow some painkillers, grit her teeth and fight her way through a few early matches at the most important tournament of the year? Maybe — but at what risk to the rest of her year in tennis, and to her desire to end that year at the top of the rankings? At an impromptu gathering