Petr Korda defeated Jaime Yzaga 6-4 6-3 in the Philadelphia round of 32 on hard. The result followed the form book — Petr Korda came in leading the head-to-head 2–0, defending last year's semi-final. Petr Korda extended the head-to-head to 3–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1990-09-24 | Basel | R32 | hard | Petr Korda | 7-6 3-6 6-3 |
| 1990-02-19 | Philadelphia | R16 | hard | Petr Korda | 2-6 6-3 7-5 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.