Head to head
4
Hard
0
John Isner's wins on the left · Lukas Lacko's on the right · bar lengths share one scale
All meetings (4)
| 2019 | Delray Beach | Hard | R16 | John Isner | 6-4 6-3 |
| 2017 | Atlanta | Hard | QF | John Isner | 7-5 6-4 |
| 2014 | Davis Cup WG PO: USA vs SVK | Hard | RR | John Isner | 6-3 6-0 |
| 2014 | Auckland | Hard | R16 | John Isner | 7-6(1) 3-6 6-2 |
Methodology
Head-to-head totals and surface splits exclude walkovers (no match was played), which follows ATP convention — walkover meetings still appear in the match list. The momentum chart plots the running lead across all counted meetings, oldest to newest.