Steffi Graf

Steffi Graf owns the only Golden Slam in tennis history — winning all four majors and Olympic gold in 1988, a feat no other player has matched. Her career tally of 22 Grand Slam singles titles exceeds the count of #6 Rod Laver by 11 and includes a 107-match win streak on clay. Graf's record 377 total weeks at world No. 1 ranks higher than any female player in the Open Era, with 186 consecutive weeks at No. 1. Her versatility on all surfaces, from Wimbledon grass to French Open clay, outperforms #7 Martina Navratilova’s 18 singles majors by four titles. That 1988 season remains a data point without parallel in the sport's history.