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 Steffi Graf's 22, and her prize money of $94.5 million is the highest in women's tennis history.