Tom Kempers defeated Wojtek Kowalski 5-7 7-6 7-5 in the Netherlands Masters 3 round of 32 on clay. The upset overturned the form book — Wojtek Kowalski came in leading the head-to-head 1–0. Tom Kempers claimed a first win over Wojtek Kowalski in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1991-06-24 | Netherlands Masters 3 | R16 | clay | Wojtek Kowalski | 6-2 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.