Head to head
3
Hard
2
0
Clay
1
0
Grass
1
John Isner's wins on the left · Ernests Gulbis's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (7)
| 2018 | Stockholm | Hard | SF | Ernests Gulbis | 1-6 6-3 6-3 |
| 2015 | Basel | Hard | R32 | John Isner | 6-3 6-4 |
| 2015 | Vienna | Hard | R16 | Ernests Gulbis | 6-4 4-6 6-4 |
| 2014 | Indian Wells Masters | Hard | QF | John Isner | 7-6(4) 7-6(3) |
| 2013 | Valencia | Hard | R32 | John Isner | 7-6(4) 7-6(2) |
| 2013 | Monte Carlo Masters | Clay | R64 | Ernests Gulbis | 4-6 6-2 6-3 |
| 2008 | Wimbledon | Grass | R128 | Ernests Gulbis | 7-5 7-5 6-7(3) 7-6(6) |
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.