| ATP Acapulco | 02/26 03:00 | 25 | [20] John Isner v Mischa Zverev [257] | 6-3,7-6 | |
| ATP New York | 02/14 00:30 | 26 | [18] John Isner v Jordan Thompson [63] | 6-7,7-6,3-6 | |
| Australian Open | 01/25 07:10 | 25 | John Isner v Stan Wawrinka | Retired | |
| Australian Open | 01/23 06:35 | 24 | [19] John Isner v Alejandro Tabilo [208] | 6-4,6-3,6-3 | |
| Australian Open | 01/21 10:00 | 23 | [19] John Isner v Thiago Monteiro [86] | 6-7,7-6,7-6,7-6 | |
| ATP Auckland | 01/17 05:05 | 28 | [20] John Isner v Ugo Humbert [57] | 6-7,4-6 | |
| ATP Auckland | 01/16 01:05 | 27 | [69] Kyle Edmund v John Isner [20] | 6-7,6-7 | |
| ATP Auckland | 01/14 23:00 | 26 | [101] Tennys Sandgren v John Isner [20] | 6-7,7-6,3-6 | |
| ATP Cup | 01/07 11:35 | 2 | [12] Fabio Fognini v John Isner [19] | 6-4,7-6 | |
| ATP Cup | 01/05 11:45 | 2 | [5] Daniil Medvedev v John Isner [19] | 6-3,6-1 | |
| ATP Cup | 01/03 03:25 | 2 | [19] John Isner v Casper Ruud [54] | 7-6,6-7,5-7 | |
| Diriyah Tennis Cup Consolation Draw | 12/14 13:00 | - | [35] Jan-Lennard Struff v John Isner [19] | 6-4,5-7,11-13 | |
| Diriyah Tennis Cup Consolation Draw | 12/13 10:00 | - | John Isner v Stan Wawrinka | 7-6,7-5 | |
| Diriyah Tennis Cup | 12/12 13:00 | 44 | [12] Fabio Fognini v John Isner [19] | 7-6,6-4 | |
| ATP Paris | 10/30 12:15 | 25 | [42] Cristian Garin v John Isner [17] | 7-6,7-6 | |
| ATP Shanghai | 10/10 07:00 | 26 | [1] Novak Djokovic v John Isner [17] | 7-5,6-3 | |
| ATP Shanghai | 10/09 04:30 | 25 | [22] Lucas Pouille v John Isner [17] | 5-7,3-6 | |
| ATP Shanghai | 10/08 04:30 | 24 | [24] Alex De Minaur v John Isner [17] | 6-7,4-6 | |
| ATP Beijing | 10/04 08:50 | 27 | [19] John Isner v Stefanos Tsitsipas [7] | 6-7,3-6 | |
| ATP Beijing | 10/03 06:30 | 26 | [19] John Isner v Daniel Evans [48] | 7-6,7-5 | |
| ATP Beijing | 10/01 05:00 | 25 | [11] Gael Monfils v John Isner [19] | 4-6,7-6,3-6 | |
| ATP Chengdu | 09/26 09:30 | 26 | [19] John Isner v Egor Gerasimov [98] | 7-6,6-7,6-7 | |
| Laver Cup | 09/22 14:45 | 44 | [3] Roger Federer v John Isner [20] | 6-4,7-6 | |
| Laver Cup | 09/21 11:00 | 44 | [6] Alexander Zverev v John Isner [20] | 7-6,4-6,1-10 | |
| US Open | 08/31 18:40 | 25 | [14] John Isner v Marin Cilic [23] | 5-7,6-3,6-7,4-6 | |
| US Open | 08/29 18:30 | 24 | [14] John Isner v Jan-Lennard Struff [37] | 6-3,7-6,7-6 | |
| US Open | 08/27 17:25 | 23 | [14] John Isner v Guillermo Garcia-Lopez [165] | 6-3,6-4,6-4 | |
| ATP Cincinnati | 08/14 02:30 | 25 | [53] Pablo C. Busta v John Isner [16] | 6-4,6-7,7-6 | |
| ATP Cincinnati | 08/11 23:00 | 24 | [28] Dusan Lajovic v John Isner [15] | 6-7,6-1,5-7 | |
| ATP Montreal | 08/07 21:15 | 25 | [36] Cristian Garin v John Isner [15] | 6-3,6-4 |
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.