Gouichi Motomura defeated Yong Il Yoon 3-6 6-2 6-2 6-3 in the KOR vs JPN round robin on carpet. The upset overturned the form book — Yong Il Yoon came in leading the head-to-head 2–1. Gouichi Motomura narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-02-04 | Davis Cup G1 QF: JPN vs KOR | RR | carpet | Gouichi Motomura | 6-3 4-6 6-4 2-6 6-3 |
| 1995-11-06 | Japan Masters 3 | F | hard | Yong Il Yoon | 6-2 6-7 6-3 |
| 1993-08-09 | Chinese Taipei Masters 3 | QF | hard | Yong Il Yoon | 6-4 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.