Seong Yoon Chung defeated Tasuku Iwami 6-3 6-3 in the Korea Rep F2 round of 32 on hard. The upset overturned the form book — Tasuku Iwami came in leading the head-to-head 1–0, but Seong Yoon Chung had been the form player, winning 2 of their last 4 on hard. Seong Yoon Chung claimed a first win over Tasuku Iwami in two meetings, narrowing the head-to-head to 1–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2008-09-01 | Thailand F4 | R32 | hard | Tasuku Iwami | 6-2 6-3 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.