American world number 24 John Isner on Friday broke Croatian Ivo Karlovic's all-time record of the most aces in men's tennis during his third-round loss against Italian Jannik Sinner at Wimbledon.
The 6'10" Isner, who turned 37 in April, surpassed Karlovic's tally of 13,728 aces with his fifth ace in the match. He served 24 aces in all against Sinner.
While a big and powerful serve isn't a guarantee for success, it does help in putting an opponent under pressure. Factors such as technique, technology and height play a major role in determining how good a player's serve is and consequently, the ability to hit aces.
The ATP began record-keeping in 1991.
Here are the top 10 players with most aces in men's tennis:-
1. John Isner (USA) - 13,748 aces
American John Isner holds the record of the most number of aces hit by a male tennis player.
Style - Right-handed
Matches - 737
Height - 6'10"
Average aces per match - 18.5
2. Ivo Karlovic (Croatia) - 13, 728 aces
FILE PHOTO: Ivo Karlovic
Style - Right-handed
Matches - 694
Height - 6'11"
Average aces per match - 19.8
3. Roger Federer (Switzerland) - 11,478 aces
FILE PHOTO: Roger Federer
Style - Right-handed
Matches - 1,462
Height - 6'1"
Average aces per match - 7.8
4. Goran Ivanisevic (Croatia) - 10,237 aces
FILE PHOTO: Goran Ivanisevic
Style - Left-handed
Matches - 731
Height - 6'4"
Average aces per match - 13.9
5. Feliciano Lopez (Spain) - 10,155 aces
FILE PHOTO: Feliciano Lopez
Style - Left-handed
Matches - 966
Height - 6'2"
Average aces per match - 10.5
6. Andy Roddick (USA) - 9,074 aces
FILE PHOTO: Andy Roddick
Style - Right-handed
Matches - 776
Height - 6'2"
Average aces per match - 11.7
7. Sam Querrey (USA) - 8,858 aces
FILE PHOTO: Sam Querrey
Style - Right-handed
Matches - 692
Height - 6'6"
Average aces per match - 12.7
8. Pete Sampras (USA) - 8,858 aces

FILE PHOTO: Pete Sampras
Style - Right-handed
Matches - 792
Height - 6'1"
Average aces per match - 11
9. Ivan Ljubicic (Croatia) - 8,138 aces
FILE PHOTO: Ivan Ljubicic
Style - Right-handed
Matches - 680
Height - 6'4"
Average aces per match - 12
10. Milos Raonic (Canada) - 8,136 aces
FILE PHOTO: Milos Raonic
Style - Right-handed
Matches - 524
Height - 6'5"
Average aces per match - 15.5
Stats:- ATP