Paul Haarhuis defeated Goran Prpic 7-6 6-2 in the Rotterdam quarter-final on hard. The result followed the form book — Paul Haarhuis came in leading the head-to-head 1–0, defending last year's semi-final. Paul Haarhuis extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1990-04-02 | Estoril | R16 | clay | Paul Haarhuis | 6-2 6-1 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.