Serena Williams' coach, Rennae Stubbs, wants to change Grand Slam rules after Novak Djokovic's exhausting five-hour Wimbledon quarterfinal against Felix Auger-Aliassime. She believes this marathon match left Djokovic too tired for his next showdown with Jannik Sinner. Stubbs suggests a tiebreaker for long matches to avoid such fatigue in the future.

Tennis

