Head to head
2
Hard
3
2
Grass
1
Denis Istomin's wins on the left · Sam Querrey's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (8)
| 2022 | Delray Beach | Hard | R32 | Denis Istomin | 6-1 7-6(5) |
| 2015 | Nottingham | Grass | F | Denis Istomin | 7-6(1) 7-6(6) |
| 2013 | Washington | Hard | R32 | Sam Querrey | 4-6 6-3 7-6(9) |
| 2012 | Queen's Club | Grass | R32 | Sam Querrey | 7-6(4) 6-3 |
| 2012 | San Jose | Hard | R32 | Denis Istomin | 5-7 6-3 7-5 |
| 2011 | Memphis | Hard | R32 | Sam Querrey | 6-7(5) 7-6(5) 6-4 |
| 2009 | Los Angeles | Hard | R32 | Sam Querrey | 6-2 6-0 |
| 2009 | Eastbourne | Grass | R16 | Denis Istomin | 3-6 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.