Serena Williams

Serena Williams is the most dominant women's tennis player of the Open Era, with 23 Grand Slam singles titles and 73 career trophies. Her 128 mph serve redefined power in the sport and secured her 319 weeks at world No. 1. She outperforms #2 (Simone Biles) in longevity, maintaining elite performance for two decades. A concrete example: no female player in history has won more major titles in the Open Era than Serena's 23.