By surface
| Surface | John Isner | Lukas Lacko |
|---|---|---|
| Hard | 4 | 0 |
All meetings (4)
| Date | Tour | Tournament | Round | Surface | Winner | Set 1 | Set 2 | Set 3 | Set 4 | Set 5 |
|---|---|---|---|---|---|---|---|---|---|---|
| 2019-02-18 | ATP | Delray Beach | Round of 16 | Hard | John Isner | 6-4 | 6-3 | |||
| 2017-07-24 | ATP | Atlanta | Quarterfinal | Hard | John Isner | 7-5 | 6-4 | |||
| 2014-09-12 | ATP | Davis Cup WG PO: USA vs SVK | Round Robin | Hard | John Isner | 6-3 | 6-0 | |||
| 2014-01-06 | ATP | Auckland | Round of 16 | Hard | John Isner | 7-61 | 3-6 | 6-2 |