[35] John Isner 7-6,6-7,6-4 Christopher O'Connell [132] 2021-07-31 00:00
Stadium: Stadium Court Round: 27 Ground: Hardcourt outdoor
Home History
| ATP Atlanta | 2021/07/29 23:00 | John Isner v Jack Sock | 7-6,6-4 |
| ATP Atlanta | 2021/07/27 19:00 | John Isner v Jeffrey John Wolf | 6-4,6-7,6-4 |
| ATP Los Cabos | 2021/07/24 03:00 | Brandon Nakashima v John Isner | 7-5,6-4 |
| ATP Los Cabos | 2021/07/23 02:30 | Alex Bolt v John Isner | 3-6,4-6 |
| ATP Los Cabos | 2021/07/22 02:15 | Evgeny Donskoy v John Isner | 5-7,6-3,6-7 |
| Wimbledon | 2021/06/30 10:00 | Yoshihito Nishioka v John Isner | 7-6,2-6,6-3,6-7,6-4 |
| French Open | 2021/06/04 19:00 | Stefanos Tsitsipas v John Isner | 5-7,6-3,7-6,6-1 |
| French Open | 2021/06/02 12:35 | Filip Krajinovic v John Isner | 6-7,1-6,6-7 |
Away History
| ATP Atlanta | 2021/07/29 17:30 | Christopher O'Connell v Jannik Sinner | 7-6,6-4 |
| ATP Atlanta | 2021/07/27 15:00 | Christopher O'Connell v Denis Kudla | 4-6,6-3,6-3 |
| ATP Atlanta | 2021/07/24 14:00 | Christopher O'Connell v Yosuke Watanuki | 7-5,6-4 |
| ATP Hamburg | 2021/07/11 13:00 | Christopher O'Connell v Alex Molcan | 3-6,7-5,3-6 |
| ATP Hamburg | 2021/07/10 12:00 | Christopher O'Connell v Ernests Gulbis | 6-3,6-0 |
| Wimbledon | 2021/06/30 12:00 | Christopher O'Connell v Gael Monfils | 6-4,2-6,6-7,6-4,4-6 |
| Wimbledon | 2021/06/24 12:00 | Christopher O'Connell v Tomas Machac | 7-6,6-4,7-6 |
| Wimbledon | 2021/06/23 13:25 | Christopher O'Connell v Ruben Bemelmans | 6-7,6-3,7-5 |