Yong Il Yoon defeated Kentaro Masuda 2-6 6-1 6-2 in the Japan Masters 4 round of 32 on hard. Yong Il Yoon extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2002-09-02 | Japan F6 | QF | hard | Kentaro Masuda | 6-3 6-4 |
| 1992-08-10 | Chinese Taipei Masters 4 | QF | hard | Yong Il Yoon | 6-4 7-5 |
Averages over each player's completed matches in the selected window (8 vs 1). ATP, WTA & Challenger.
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. Small sample — read as indicative. About