Head to head
2
Hard
3
1
Clay
1
0
Grass
1
John Isner's wins on the left · Viktor Troicki's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (8)
| 2017 | Shanghai Masters | Hard | R16 | Viktor Troicki | 6-4 7-6(4) |
| 2017 | Cincinnati Masters | Hard | R64 | John Isner | 7-6(3) 6-4 |
| 2015 | Queen's Club | Grass | QF | Viktor Troicki | 7-6(5) 6-3 |
| 2015 | Monte Carlo Masters | Clay | R32 | John Isner | 7-6(4) 7-6(5) |
| 2011 | Canada Masters | Hard | R32 | Viktor Troicki | 6-4 3-6 6-2 |
| 2011 | Washington | Hard | QF | John Isner | 7-6(5) 3-6 6-1 |
| 2010 | Davis Cup WG R1: SRB vs USA | Clay | RR | Viktor Troicki | 7-6(4) 6-7(5) 7-5 6-4 |
| 2009 | Bangkok | Hard | QF | Viktor Troicki | 7-6(3) 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.