24
Most Grand Slam singles titles (all-time)
Court's total spans the amateur and Open eras and stood alone for fifty years; Novak Djokovic equalled it in 2023, and Serena Williams (23) and Steffi Graf (22) sit just behind.
Tennis has kept careful count for a century and a half, and its most valued records are the Grand Slam and world-ranking milestones by which greatness is measured. Others capture the sport's extremes — the longest match, the fastest serve, the most improbable streaks — the outer edges of what the game has produced.
The marks below span both tours and reach from pre-Open-era amateurs to the current generation. Several look effectively permanent: Nadal's 14 Roland Garros titles, Graf's 1988 Golden Slam, and the 70-68 final set that helped force the majors to adopt uniform deciding-set tiebreaks.
Records
24
Most men's Grand Slam singles titles
Djokovic reached 24 at the 2023 US Open, all against open, global 128-draw fields, moving two clear of Nadal and four clear of Federer as the men's benchmark.
428 weeks
Most weeks at world No.1
Djokovic passed Steffi Graf's long-standing all-time record of 377 weeks in 2021 and extended it beyond 420, more than 50 weeks clear of any player of either sex.
237 weeks
Most consecutive weeks at No.1
Federer held the top ranking without interruption for more than four and a half years, the longest unbroken reign of the computer-ranking era on either tour.
14
Most titles at a single major
Nadal's 14 Roland Garros titles, alongside a 112-4 match record in Paris, are the most dominant single-tournament record in the history of the sport.
167
Most WTA singles titles
Navratilova's 167 tour-level singles titles are the most by any player in the Open Era, ahead of Jimmy Connors's 109 on the men's side.
4 majors + Olympic gold
Only calendar-year Golden Slam
Graf won all four Grand Slams and Olympic singles gold in a single season, at 19 — a sweep no other player, man or woman, has ever achieved.
11h 05m
Longest match ever played
The first-round Wimbledon marathon stretched over three days and ended 70-68 in the fifth set, directly prompting the majors' later move to deciding-set tiebreaks.
113 aces
Most aces in a single match
Isner served 113 aces across the 11-hour Wimbledon epic against Mahut, who added 103 of his own — a combined 216 that no match has approached.
263.4 km/h
Fastest serve recorded
Groth's delivery, about 163.7 mph, was clocked at a Challenger event in Busan and stands as the fastest serve ever recorded, though not on the main tour.
109
Most career singles titles (men)
Connors's 109 tour-level titles remain the Open-era men's record, ahead of Roger Federer's 103, compiled across a career that also produced 1,274 match wins.
74 matches
Longest women's winning streak
Navratilova won 74 consecutive singles matches in 1984, the longest unbeaten run in the Open era for either tour, during her period of near-total dominance.
16 yr 6 mo
Youngest world No.1
Hingis became the youngest player ever to top the world rankings; on the men's side Carlos Alcaraz set the ATP mark at 19 in 2022.
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