Head to head
1
Hard
1
0
Clay
1
0
Carpet
1
Nikolay Davydenko's wins on the left · Nicolas Kiefer's on the right · bar lengths share one scale
All meetings (4)
| 2008 | Canada Masters | Hard | R16 | Nicolas Kiefer | 4-6 6-4 6-4 |
| 2008 | Hamburg Masters | Clay | R16 | Nicolas Kiefer | 7-5 6-3 |
| 2007 | US Open | Hard | R64 | Nikolay Davydenko | 6-2 6-2 6-2 |
| 2005 | St. Petersburg | Carpet | QF | Nicolas Kiefer | 6-1 6-1 |
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.