Serena Williams

Serena Williams holds the Open Era record with 23 Grand Slam singles titles, including a 2017 Australian Open win while eight weeks pregnant. She spent 319 weeks as world No.1 and won four Olympic gold medals, redefining the sport's power. Her 23 majors outperforms #2 Steffi Graf's 22, and her prize money of $94.5 million is the highest in women's tennis history.