Roland So defeated Yong Il Yoon 4-6 6-4 6-4 in the Chinese Taipei Masters 1 round of 32 on hard. The upset overturned the form book — Yong Il Yoon came in leading the head-to-head 1–0, but Roland So had been the form player, winning 1 of their last 4 on hard. Roland So claimed a first win over Yong Il Yoon in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 1993-02-05 | Philippines Masters 1 | SF | hard | Yong Il Yoon | 6-7 7-6 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.