Daniel Vacek defeated Nicolas Kiefer 7-5 6-4 in the Tashkent round of 32 on hard. The upset overturned the form book — Nicolas Kiefer came in leading the head-to-head 4–0. Daniel Vacek claimed a first win over Nicolas Kiefer in five meetings, narrowing the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-02-14 | Rotterdam | R32 | hard | Nicolas Kiefer | 6-2 6-4 |
| 1999-09-13 | Tashkent | SF | hard | Nicolas Kiefer | 7-6(4) 6-2 |
| 1999-08-02 | Canada Masters | R64 | hard | Nicolas Kiefer | 6-2 7-5 |
| 1999-06-07 | Halle | SF | grass | Nicolas Kiefer | 6-4 6-3 |
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 (10 vs 200). ATP, WTA & Challenger.