| ATP Cincinnati | 08/19 19:00 | 27 | [7] Stefanos Tsitsipas v John Isner [50] | 7-6,5-7,6-3 | |
| ATP Cincinnati | 08/18 20:00 | 26 | [52] Sebastian Korda v John Isner [50] | 6-7,6-1,6-7 | |
| ATP Cincinnati | 08/17 16:35 | 25 | [50] John Isner v Hubert Hurkacz [10] | 7-6,6-7,6-2 | |
| ATP Cincinnati | 08/15 18:00 | 24 | [48] Benjamin Bonzi v John Isner [50] | 6-7,6-3,6-7 | |
| ATP Atlanta | 07/30 00:00 | 27 | [43] Jenson Brooksby v John Isner [25] | 3-6,6-1,6-4 | |
| ATP Atlanta | 07/29 00:40 | 26 | [281] Ben Shelton v John Isner [25] | 6-7,6-4,6-7 | |
| ATP Newport | 07/16 17:00 | 28 | [41] Maxime Cressy v John Isner [22] | 6-2,4-6,6-3 | |
| ATP Newport | 07/14 18:15 | 27 | [48] Benjamin Bonzi v John Isner [22] | 6-7,7-6,6-7 | |
| ATP Newport | 07/13 19:55 | 26 | [91] Peter Gojowczyk v John Isner [22] | 3-6,6-7 | |
| Wimbledon | 07/01 15:05 | 25 | [13] Jannik Sinner v John Isner [24] | 6-4,7-6,6-3 | |
| Wimbledon | 06/29 16:40 | 24 | [52] Andy Murray v John Isner [24] | 4-6,6-7,7-6,4-6 | |
| Wimbledon | 06/27 12:55 | 23 | [206] Enzo Couacaud v John Isner [24] | 7-6,6-7,6-4,3-6,5-7 | |
| French Open | 05/27 13:40 | 25 | [26] John Isner v Bernabe Zapata Miralles [131] | 4-6,6-3,4-6,7-6,3-6 | |
| French Open | 05/25 09:00 | 24 | [26] John Isner v Gregoire Barrere [210] | 6-4,6-4,3-6,7-6 | |
| French Open | 05/22 11:40 | 23 | [26] John Isner v Quentin Halys [86] | 7-6,4-6,7-6,7-6 | |
| ATP Rome | 05/11 10:50 | 25 | [4] Rafael Nadal v John Isner [27] | 6-3,6-1 | |
| ATP Rome | 05/10 11:25 | 24 | [49] Francisco Cerundolo v John Isner [27] | 4-6,3-6 | |
| ATP Madrid | 05/04 12:25 | 25 | [11] Cameron Norrie v John Isner [23] | 6-4,6-7,6-4 | |
| ATP Madrid | 05/01 13:00 | 24 | [49] Filip Krajinovic v John Isner [25] | 6-7,4-6 | |
| ATP Houston | 04/10 19:00 | 29 | [18] Reilly Opelka v John Isner [27] | 6-3,7-6 | |
| ATP Houston | 04/09 19:30 | 28 | [27] John Isner v Cristian Garin [29] | 4-6,6-3,6-4 | |
| ATP Houston | 04/08 23:00 | 27 | [30] Frances Tiafoe v John Isner [27] | 4-6,6-2,3-6 | |
| ATP Houston | 04/08 01:55 | 26 | [108] Steve Johnson v John Isner [27] | 7-6,6-7,3-6 | |
| ATP Miami | 03/25 18:05 | 24 | [22] John Isner v Hugo Gaston [68] | 6-7,4-6 | |
| ATP Indian Wells | 03/16 21:30 | 26 | [23] John Isner v Grigor Dimitrov [35] | 3-6,6-7 | |
| ATP Indian Wells | 03/15 22:05 | 25 | [14] Diego Schwartzman v John Isner [23] | 5-7,3-6 | |
| ATP Indian Wells | 03/13 18:00 | 24 | [114] Sam Querrey v John Isner [23] | 6-7,6-7 | |
| ATP Acapulco | 02/24 00:00 | 26 | [12] Cameron Norrie v John Isner [23] | 6-7,6-3,6-4 | |
| ATP Acapulco | 02/22 00:00 | 25 | [152] Fernando Verdasco v John Isner [23] | 5-7,7-6,6-7 | |
| ATP Dallas | 02/12 22:00 | 28 | [26] John Isner v Reilly Opelka [23] | 6-7,6-7 |
Wikipedia - John Isner
John Robert Isner (born April 26, 1985) is an American former professional tennis player. He was ranked as high as world No. 8 in singles and No. 14 in doubles by the Association of Tennis Professionals (ATP).Considered one of the best servers ever to play on the ATP Tour, Isner achieved his career-high singles ranking in July 2018 by virtue of his first Masters 1000 crown at the 2018 Miami Open and a semifinal appearance at the 2018 Wimbledon Championships. He also twice reached the quarterfinals at the US Open in 2011 and 2018, the latter of which helped qualify him for an ATP Finals appearance later that year. At the 2010 Wimbledon Championships, he played the longest professional tennis match in history, requiring five sets and 183 games to defeat Nicolas Mahut in a match which lasted 11 hours and 5 minutes, and was played over the course of three days. Isner holds the record for hitting the ATP's fastest "official" serve ever and third-fastest on record in tennis at 157.2 mph or 253 km/h during his first-round 2016 Davis Cup match. He has the most aces in the history of the ATP Tour, having served 14,470, as of August 31, 2023. Isner retired from professional tennis following the 2023 US Open.