[133] Lukas Lacko 4-6,3-6 John Isner [9] 2019-02-20 23:00
Stadium: Stadium Round: 26 Ground: Hardcourt outdoor
Head to Head
| ATP Atlanta | 2017/07/28 18:10 | Lukas Lacko v John Isner | 5-7,4-6 |
| Davis Cup | 2014/09/14 17:30 | John Isner v Lukas Lacko | 6-3,6-0 |
Home History
| ATP Delray Beach | 2019/02/18 17:30 | Lukas Lacko v Yosuke Watanuki | 6-4,6-4 |
| ATP New York | 2019/02/11 19:25 | Lukas Lacko v Bernard Tomic | 4-6,2-6 |
| ATP Sofia | 2019/02/03 15:15 | Lukas Lacko v Alexandar Lazarov | 6-7,2-6 |
| Australian Open | 2019/01/08 06:30 | Lukas Lacko v Tim Smyczek | 4-6,6-4,6-7 |
| Challenger Bratislava | 2018/11/08 16:00 | Lukas Lacko v Egor Gerasimov | 3-6,3-6 |
| Challenger Bratislava | 2018/11/07 15:30 | Lukas Lacko v Stephane Robert | 4-6,6-4,7-5 |
| Challenger Eckental | 2018/10/31 16:00 | Lukas Lacko v Simone Bolelli | 6-7,3-6 |
| ATP Stockholm | 2018/10/18 12:30 | Lukas Lacko v Fabio Fognini | 4-6,4-6 |
Away History
| ATP Delray Beach | 2019/02/19 20:05 | Peter Polansky v John Isner | 3-6,6-7 |
| ATP New York | 2019/02/17 00:00 | John Isner v Reilly Opelka | 7-6,6-7,6-7 |
| ATP New York | 2019/02/16 00:00 | John Isner v Jordan Thompson | 6-4,6-1 |
| ATP New York | 2019/02/14 00:30 | John Isner v Bernard Tomic | 7-6,6-4 |
| Australian Open | 2019/01/14 02:55 | Reilly Opelka v John Isner | 7-6,7-6,6-7,7-6 |
| ATP Auckland | 2019/01/08 23:00 | John Isner v Taylor Fritz | 6-7,6-7 |
| ATP World Tour Finals | 2018/11/16 14:00 | Alexander Zverev v John Isner | 7-6,6-3 |
| ATP World Tour Finals | 2018/11/14 20:00 | Marin Cilic v John Isner | 6-7,6-3,6-4 |