Vladimir Voltchkov defeated Nicolas Kiefer 7-5 7-5 in the St. Petersburg quarter-final on carpet. The result followed the form book — Vladimir Voltchkov came in defending last year's round of 16. Vladimir Voltchkov extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2004-08-16 | Athens Olympics | R64 | hard | Nicolas Kiefer | 6-2 6-4 |
| 2001-01-01 | Doha | QF | hard | Vladimir Voltchkov | 6-2 6-1 |
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About
Averages over each player's completed matches in the selected window (47 vs 200). ATP, WTA & Challenger.