Miloslav Grolmus defeated Jan Vacek 6-3 7-6 in the Slovak Republic Masters 3 round of 16 on clay. The upset overturned the form book — Jan Vacek came in leading the head-to-head 1–0. Miloslav Grolmus claimed a first win over Jan Vacek in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1999-10-25 | Czech Republic Masters 2 | QF | carpet | Jan Vacek | 6-1 2-6 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.