Head to head
0
Hard
3
1
Clay
2
0
Grass
1
Dusan Lajovic's wins on the left · John Isner's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (7)
| 2019 | Cincinnati Masters | Hard | R64 | John Isner | 7-6(3) 1-6 7-5 |
| 2018 | US Open | Hard | R32 | John Isner | 7-6(8) 6-7(6) 6-3 7-5 |
| 2018 | Davis Cup WG R1: USA vs SRB | Clay | RR | John Isner | 6-4 6-7(7) 6-3 3-6 7-6(4) |
| 2017 | Shanghai Masters | Hard | R64 | John Isner | 4-6 7-6(5) 7-6(6) |
| 2017 | Eastbourne | Grass | R16 | John Isner | 3-6 7-6(2) 7-6(4) |
| 2016 | Buenos Aires | Clay | R16 | Dusan Lajovic | 7-6(10) 4-6 7-6(6) |
| 2015 | Nice | Clay | QF | John Isner | 7-6(3) 6-4 |
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.