Steffi Graf

Steffi Graf is the only tennis player ever to achieve the Golden Slam—four Grand Slam titles plus Olympic gold in 1988—and spent 377 weeks at world #1, more than any other player except Novak Djokovic. She won 22 Grand Slam singles titles, with a 92% win rate in Grand Slam finals. Her 1988 season remains the benchmark, outperforming #3 Serena Williams’ best single-year Grand Slam haul by two titles.