Yong Il Yoon defeated Danai Udomchoke 7-6 6-1 in the Japan F4 round of 32 on carpet. Yong Il Yoon extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2000-12-04 | Philippines F2 | F | hard | Danai Udomchoke | 6-3 3-6 7-5 |
| 1999-06-07 | Japan 1 Masters 3 | F | hard | Yong Il Yoon | 6-3 3-6 6-2 |
Averages over each player's completed matches in the selected window (8 vs 89). 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. About