Head to head
1
Hard
4
1
Clay
2
2
Grass
1
Denis Istomin's wins on the left · Andreas Seppi's on the right · bar lengths share one scale
Momentum
Running lead across all meetings, oldest to newest (walkovers excluded).
All meetings (11)
| 2018 | Eastbourne | Grass | R32 | Denis Istomin | 6-3 6-7(4) 7-6(4) |
| 2016 | Sydney | Hard | R32 | Andreas Seppi | 6-4 4-6 6-2 |
| 2015 | Australian Open | Hard | R128 | Andreas Seppi | 5-7 6-3 2-6 6-1 6-4 |
| 2014 | Dusseldorf | Clay | QF | Denis Istomin | 6-3 6-4 |
| 2013 | US Open | Hard | R32 | Denis Istomin | 6-3 6-4 2-6 3-6 6-1 |
| 2013 | Wimbledon | Grass | R128 | Andreas Seppi | 7-6(6) 7-6(3) 5-7 3-6 6-3 |
| 2013 | Australian Open | Hard | R64 | Andreas Seppi | 7-6(4) 5-7 6-7(3) 7-6(3) 6-2 |
| 2012 | Wimbledon | Grass | R128 | Denis Istomin | 6-7(2) 6-4 3-6 6-3 8-6 |
| 2012 | Rome Masters | Clay | R64 | Andreas Seppi | 6-4 3-6 6-3 |
| 2011 | Kitzbuhel | Clay | R32 | Andreas Seppi | 6-2 6-2 |
| 2011 | Sydney | Hard | R32 | Andreas Seppi | 6-1 6-0 |
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.