Chris Evert

Chris Evert boasts the highest career win rate in Open Era history at 89.97%, surpassing Steffi Graf's 90.9% only marginally. She won 18 Grand Slam singles titles, including seven French Opens, and never lost before the quarterfinals in 56 consecutive majors—a consistency 30% better than the average elite player. Her $8.9 million in prize money, though lower than Serena Williams' earnings, reflects her two-decade dominance.