Markus Naewie defeated Daniel Vacek 6-3 7-6 in the Hamburg round of 64 on clay. The upset overturned the form book — Daniel Vacek came in leading the head-to-head 1–0. Markus Naewie claimed a first win over Daniel Vacek in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1993-01-18 | Australian Open | R128 | hard | Daniel Vacek | 6-3 6-4 3-6 4-6 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.