Woong Sun Jun defeated Seong Yoon Chung 6-3 6-2 in the Japan F8 round of 16 on hard. The result followed the form book — Woong Sun Jun came in leading the head-to-head 1–0. Woong Sun Jun extended the head-to-head to 2–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2006-06-19 | Japan F7 | R16 | carpet | Woong Sun Jun | 7-6(8) 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.