Head to head
1
Hard
2
Nicolas Kiefer's wins on the left · Vladimir Voltchkov's on the right · bar lengths share one scale
All meetings (3)
| 2004 | Athens Olympics | Hard | R64 | Nicolas Kiefer | 6-2 6-4 |
| 2002 | St. Petersburg | Hard | QF | Vladimir Voltchkov | 7-5 7-5 |
| 2001 | Doha | Hard | QF | Vladimir Voltchkov | 6-2 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.