Serena Williams

Serena Williams's 23 Grand Slam singles titles lead the Open Era across both genders, a full 3 titles ahead of the next-closest active woman (Venus Williams's 7 in singles). Her 319 weeks at world No. 1 are second only to Steffi Graf's 377, yet she outperforms #3 Federer's 310-week total. Her serve, clocking a record 128.6 mph at Wimbledon in 2010, produced 39.1% of her career aces and anchored a game that yielded an 85.5% win rate on hard courts. Williams was inducted into the International Tennis Hall of Fame in 2025, cementing her legacy as the most dominant female player since data tracking began in 1975.