[19] John Isner 6-7,7-6,7-6,7-6 Thiago Monteiro [86] 2020-01-21 10:00
Stadium: Court 8 Round: 23 Ground: Hardcourt outdoor
Home History
| ATP Auckland | 2020/01/17 05:05 | John Isner v Ugo Humbert | 6-7,4-6 |
| ATP Auckland | 2020/01/16 01:05 | Kyle Edmund v John Isner | 6-7,6-7 |
| ATP Auckland | 2020/01/14 23:00 | Tennys Sandgren v John Isner | 6-7,7-6,3-6 |
| ATP Cup | 2020/01/07 11:35 | Fabio Fognini v John Isner | 6-4,7-6 |
| ATP Cup | 2020/01/05 11:45 | Daniil Medvedev v John Isner | 6-3,6-1 |
| ATP Cup | 2020/01/03 03:25 | John Isner v Casper Ruud | 7-6,6-7,5-7 |
| Diriyah Tennis Cup Consolation Draw | 2019/12/14 13:00 | Jan-Lennard Struff v John Isner | 6-4,5-7,11-13 |
| Diriyah Tennis Cup Consolation Draw | 2019/12/13 10:00 | John Isner v Stan Wawrinka | 7-6,7-5 |
Away History
| ATP Auckland | 2020/01/15 03:00 | Thiago Monteiro v Benoit Paire | 6-4,4-6,3-6 |
| ATP Auckland | 2020/01/13 02:30 | Cameron Norrie v Thiago Monteiro | 6-7,2-6 |
| ATP Auckland | 2020/01/11 22:00 | Thiago Monteiro v Leonardo Mayer | 7-6,4-6,6-1 |
| ATP Auckland | 2020/01/11 00:10 | Thiago Monteiro v Ajeet Rai | 6-4,6-2 |
| ATP Doha | 2020/01/05 12:30 | Gregoire Barrere v Thiago Monteiro | 6-4,6-4 |
| ATP Doha | 2020/01/04 09:10 | Rashed Nawaf v Thiago Monteiro | 2-6,0-6 |
| Challenger Montevideo | 2019/11/06 14:00 | Guilherme Clezar v Thiago Monteiro | 7-6,6-7,6-3 |
| Challenger Guayaquil | 2019/10/30 16:00 | Thiago Seyboth Wild v Thiago Monteiro | 7-6,7-6 |