The Golden Slam is unmatched, and 22 majors plus historic weeks at No. 1 make her the strongest challenger for the top spot.
Best evidence
Graf won 22 Grand Slam singles titles, completed the 1988 Golden Slam, and combined elite longevity with one of the most dominant peaks in tennis history.
Her week-to-week reliability and major-final record are historically elite, but her peak feels slightly less overwhelming than the top four.
Best evidence
Evert won 18 Grand Slam singles titles, reached 34 major finals, and set a standard for consistency with a career winning percentage often cited among the best in tennis history.
Her singles résumé is great, and her structural impact on women's tennis makes her historically indispensable.
Best evidence
King won 12 Grand Slam singles titles and had an impact beyond results, helping create the modern women's tour and becoming a central figure in equal-prize-money history.
Best combination of major count in the professional era, peak dominance, longevity, and era-adjusted strength of field.
Best evidence
Williams owns the Open Era record with 23 Grand Slam singles titles, added long stretches at No. 1, and won majors across three decades against increasingly global and athletic fields.
Her singles greatness plus unmatched total-career breadth make her hard to rank below third, even with fewer singles majors.
Best evidence
Navratilova won 18 Grand Slam singles titles, 167 tour-level singles titles, and became the defining all-court force of the 1980s while also setting extraordinary doubles benchmarks.
Her peak and age-adjusted major pace were historically rare, earning a top-seven place despite an interrupted career.
Best evidence
Seles won nine Grand Slam singles titles before age 20 and was the sport's dominant force before the 1993 stabbing disrupted one of the strongest early-career arcs ever.