Head to head
1
Hard
2
1
Grass
0
Denis Istomin's wins on the left · Illya Marchenko's on the right · bar lengths share one scale
All meetings (4)
| 2010 | St. Petersburg | Hard | R32 | Illya Marchenko | 6-2 2-2 RET |
| 2010 | Moscow | Hard | R32 | Denis Istomin | 6-7(4) 6-2 6-2 |
| 2010 | Eastbourne | Grass | QF | Denis Istomin | 6-1 6-4 |
| 2009 | Moscow | Hard | R32 | Illya Marchenko | 1-6 6-4 4-1 RET |
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.