Tennis boycott and US Open tension; Djokovic proposes rule changes; Alcaraz withdraws from Cincinnati; Clijsters pushes back; Sabalenka backs sex testing

Top stars skip Montreal; US Open tension high. Alcaraz wrist injury serious – 106 days out, Cincinnati withdrawal confirmed. Djokovic proposes shorter sets, no ad, two-hour matches, sparking format debate; Kim Clijsters pushes back on the four-game set idea. Sabalenka resets for hard-court summer and publicly supports WTA sex testing. Tsitsipas hires new coach. Federer's Hall of Fame induction scheduled ahead of US Open.