John Isner holds the men’s ATP Tour record for the most career aces, with 14,470. The 6-foot-10 American finished ahead of fellow big server Ivo Karlovic, whose career total was 13,728.
Those numbers show how much damage a great serve can do over a long career. They also need context: career ace totals reward players who serve well and play a lot of matches, and older records can be harder to compare because detailed statistics were not kept consistently across every era.
Most career aces in men’s tennis
The figures below are commonly listed ATP Tour career totals for the leading players. All six are retired, so their totals will not change. The ATP’s statistical records are most useful for comparing players from the modern data era; they are not a complete count of every ace ever hit in professional tennis.
| Rank | Player | Career aces |
|---|---|---|
| 1 | John Isner | 14,470 |
| 2 | Ivo Karlovic | 13,728 |
| 3 | Roger Federer | 11,478 |
| 4 | Sam Querrey | 10,275 |
| 5 | Feliciano Lopez | 10,261 |
| 6 | Goran Ivanisevic | 10,131 |
Why John Isner holds the record
Isner’s total came from a combination of height, power and years on tour. At 6-foot-10, he could strike the ball from a high contact point and make it hard for returners to reach, especially when he sent a serve out wide. His booming first serve was the headline, but a well-placed second serve also helped him avoid giving opponents easy attacks.
His match against Nicolas Mahut at Wimbledon in 2010 is the most famous example of his serving endurance. Isner hit 113 aces in that match alone. It lasted 11 hours and five minutes across three days, and the final set ended 70–68. That one match was extraordinary, but Isner’s record is really the result of repeating his serving strengths across a long career.
His style also helped him compete when his groundstrokes were not as strong as those of the tour’s best baseliners. A powerful serve could earn quick points, set up a manageable first volley or keep pressure on the opponent in a tiebreak. It made Isner especially difficult to break on fast courts.
How Karlovic, Federer and the other leaders compare
Ivo Karlovic: a serve built around height and variation
Karlovic was only slightly taller than Isner, but his serving game had its own character. He mixed pace, angles and spin, and his high contact point made even his second serve dangerous. He often looked to end points quickly, including with serve-and-volley play. His 13,728 aces put him more than 2,200 behind Isner, but comfortably ahead of every other player on the list.
Roger Federer: aces as part of a complete attack
Federer’s 11,478 aces stand out because his serve was only one part of an unusually complete game. He used disguise, precise placement and changes of pace rather than relying only on raw power. A serve aimed at the body, for example, could jam a returner and leave Federer in control of the next shot. His total also reflects the huge number of matches he played at the highest level.
Querrey, Lopez and Ivanisevic
Sam Querrey and Feliciano Lopez finished just 14 aces apart. Both relied on a strong left-handed serve, a useful advantage for creating awkward angles in the deuce court. Ivanisevic, another left-hander, was famous for a huge serve and an attacking game. His ace count is a reminder that the serve has long been a major weapon, even though comparisons across generations are affected by differences in record keeping and playing conditions.
What a career ace total does and doesn’t tell you
An ace is a serve the returner cannot touch with the racket. It is a clean measure of one outcome, but it is not a full report card on a player’s serve. A serve that forces a weak return may be just as valuable to the server, even though the point continues.
- Match volume matters: More seasons and more matches create more chances to hit aces.
- Style matters: Tall, aggressive servers often chase quick points, while other players may use the serve mainly to set up their groundstrokes.
- Conditions matter: Fast courts and certain balls can make serves harder to return; slow, high-bouncing conditions can help the returner.
- Statistics have limits: Detailed ace records are not equally complete for every player and era.
For a fairer comparison of serving effectiveness, look at aces alongside first-serve percentage, first-serve points won, second-serve points won and service games held. Those numbers show not just how often a player hits an ace, but how well the serve helps win points overall.
What about the women’s career ace record?
Men’s ATP and women’s WTA career ace totals are tracked separately, so there is no single official all-tour ranking that directly combines them. The figures in this article are the leading men’s ATP totals. WTA rankings can also change while active players continue to compete, so check the tour’s current statistics for an up-to-date women’s list.
Frequently Asked Questions
Who has the most aces in tennis history?
In the commonly cited ATP Tour career records, John Isner leads the men with 14,470 aces. Because statistics are incomplete for some earlier eras, that figure is best understood as the modern ATP record, not a perfect count across all professional tennis history.
How many career aces did Ivo Karlovic hit?
Karlovic finished his career with 13,728 aces, placing him second behind Isner on the ATP list shown here.
Does the ace record include Grand Slam matches?
ATP career statistics cover tour-level matches, including Grand Slam events in the modern statistical record. Coverage can vary for older matches, so totals from different eras may not be equally complete.
Is the player with the most aces always the best server?
No. Aces count serves that cannot be returned, but they do not include forced errors or weak returns that set up an easy next shot. Serve points won and service games held give a broader picture.
Final Thoughts
John Isner’s 14,470 career aces put him at the top of the modern men’s ATP record book, with Ivo Karlovic next at 13,728. Their totals reflect exceptional serving skill, but also long careers and playing styles built around winning points quickly. For a fuller sense of who served best, pair ace counts with the rest of the serving statistics.
