[84] Thiago Monteiro 4-6,6-7 John Isner [25] 2020-08-19 17:35
Stadium: Stadium Round: 26 Ground: Hardcourt outdoor
Head to Head
| Australian Open | 2020/01/21 10:00 | John Isner v Thiago Monteiro | 6-7,7-6,7-6,7-6 |
Home History
| Davis Cup | 2020/03/07 05:00 | John Millman v Thiago Monteiro | 6-7,7-6,7-6 |
| Davis Cup | 2020/03/06 02:30 | Jordan Thompson v Thiago Monteiro | 6-4,6-4 |
| ATP Santiago | 2020/02/28 17:20 | Thiago Monteiro v Albert Ramos-Vinolas | 4-6,4-6 |
| ATP Santiago | 2020/02/27 16:00 | Thiago Monteiro v Roberto Carballes Baena | 6-1,6-4 |
| ATP Santiago | 2020/02/25 16:00 | Thiago Monteiro v Leonardo Mayer | 6-7,6-3,6-4 |
| ATP Rio De Janeiro | 2020/02/19 22:00 | Thiago Monteiro v Attila Balazs | 6-1,1-6,4-6 |
| ATP Rio De Janeiro | 2020/02/19 00:20 | Guido Pella v Thiago Monteiro | 7-5,4-6,6-7 |
| ATP Buenos Aires | 2020/02/15 02:05 | Thiago Monteiro v Pedro Sousa | 6-7,4-6 |
Away History
| All American Team Cup | 2020/07/05 18:20 | John Isner v Christopher Eubanks | 5-7,6-4,6-10 |
| All American Team Cup | 2020/07/04 22:00 | John Isner v Kevin King | 6-1,6-3 |
| All American Team Cup | 2020/07/03 22:00 | John Isner v Taylor Fritz | 6-3,6-4 |
| ATP Acapulco | 2020/02/29 00:05 | Taylor Fritz v John Isner | 2-6,7-5,6-3 |
| ATP Acapulco | 2020/02/27 23:00 | John Isner v Tommy Paul | 7-6,3-6,6-2 |
| ATP Acapulco | 2020/02/26 23:40 | John Isner v Marcos Giron | 6-3,7-6 |
| ATP Acapulco | 2020/02/26 03:00 | John Isner v Mischa Zverev | 6-3,7-6 |
| ATP New York | 2020/02/14 00:30 | John Isner v Jordan Thompson | 6-7,7-6,3-6 |