| ATP Dallas | 02/12 01:00 | 27 | [150] Vasek Pospisil v John Isner [26] | 4-6,4-6 | |
| ATP Dallas | 02/10 01:00 | 26 | [101] Kevin Anderson v John Isner [26] | 6-7,7-6,6-7 | |
| Australian Open | 01/18 03:15 | 23 | [70] Maxime Cressy v John Isner [25] | 7-6,7-5,6-7,6-7,6-4 | |
| ATP Adelaide 2 | 01/12 04:30 | 26 | [145] Thanasi Kokkinakis v John Isner [24] | 6-7,7-6,7-6 | |
| ATP Cup | 01/05 23:00 | 1 | [25] Daniel Evans v John Isner [24] | 6-4,7-6 | |
| ATP Cup | 01/03 23:00 | 1 | [51] Jan-Lennard Struff v John Isner [24] | 7-6,4-6,7-5 | |
| ATP Cup | 01/01 23:00 | 1 | [238] Brayden Schnur v John Isner [24] | 1-6,3-6 | |
| ATP Cup | 01/01 23:00 | 1 | Denis Shapovalov v John Isner | Cancelled | |
| Davis Cup | 11/28 19:10 | 2 | [24] John Isner v Daniel Elahi Galan [111] | 3-6,6-3,6-7 | |
| Davis Cup | 11/26 16:45 | 2 | [24] John Isner v Jannik Sinner [10] | 2-6,0-6 | |
| ATP Indian Wells | 10/12 18:00 | 25 | John Isner v Jannik Sinner | Walkover | |
| ATP Indian Wells | 10/11 03:30 | 24 | [24] John Isner v Yoshihito Nishioka [75] | 6-3,6-4 | |
| Laver Cup | 09/26 20:35 | 44 | Stefanos Tsitsipas v John Isner | Cancelled | |
| Laver Cup | 09/25 18:50 | 44 | [4] Alexander Zverev v John Isner [22] | 7-6,6-7,10-5 | |
| US Open | 08/30 17:35 | 23 | [22] John Isner v Brandon Nakashima [84] | 6-7,6-7,3-6 | |
| ATP Cincinnati | 08/19 16:05 | 26 | [26] John Isner v Benoit Paire [50] | 6-7,7-6,1-6 | |
| ATP Cincinnati | 08/18 19:35 | 25 | [15] Jannik Sinner v John Isner [26] | 7-5,6-7,4-6 | |
| ATP Cincinnati | 08/17 17:55 | 24 | [25] John Isner v Cameron Norrie [31] | 4-6,7-6,6-4 | |
| ATP Toronto | 08/15 00:00 | 28 | Daniil Medvedev v John Isner | 6-2,6-2 | |
| ATP Toronto | 08/14 01:35 | 27 | [30] John Isner v Gael Monfils [22] | 7-6,6-4 | |
| ATP Toronto | 08/12 16:35 | 26 | [7] Andrey Rublev v John Isner [30] | 5-7,6-7 | |
| ATP Toronto | 08/11 15:00 | 25 | [30] John Isner v Cristian Garin [20] | 4-6,6-3,6-4 | |
| ATP Toronto | 08/10 17:25 | 24 | [30] John Isner v Alejandro Davidovich Fokina [34] | 6-4,6-1 | |
| ATP Atlanta | 08/01 21:00 | 29 | [115] Brandon Nakashima v John Isner [35] | 6-7,5-7 | |
| ATP Atlanta | 07/31 23:00 | 28 | [42] Taylor Fritz v John Isner [35] | 6-7,7-5,3-6 | |
| ATP Atlanta | 07/31 00:00 | 27 | [35] John Isner v Christopher O'Connell [132] | 7-6,6-7,6-4 | |
| ATP Atlanta | 07/29 23:00 | 26 | [35] John Isner v Jack Sock [201] | 7-6,6-4 | |
| ATP Atlanta | 07/27 19:00 | 25 | [35] John Isner v Jeffrey John Wolf [151] | 6-4,6-7,6-4 | |
| ATP Los Cabos | 07/24 03:00 | 28 | [134] Brandon Nakashima v John Isner [39] | 7-5,6-4 | |
| ATP Los Cabos | 07/23 02:30 | 27 | [148] Alex Bolt v John Isner [39] | 3-6,4-6 |
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.