Steffi Graf

Steffi Graf is the only tennis player—male or female—to achieve the Golden Slam, winning all four Grand Slams and Olympic gold in 1988. Her 377 weeks at world No.1 ranks as the longest global record, surpassing Serena Williams' 319 weeks. With 22 Grand Slam singles titles, including seven Wimbledon crowns, she dominated with a 90.9% career win rate, faster than the average top-10 player.