Chin Wei Chan defeated Jin A Lee 6-1 4-6 6-2 in the Seoul 25K round of 32 on hard. The upset overturned the form book — Jin A Lee came in leading the head-to-head 3–1. Chin Wei Chan narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2011-04-11 | Incheon 25K | R32 | hard | Jin A Lee | 4-6 6-1 7-5 |
| 2008-05-19 | Nagano 25K | SF | carpet | Jin A Lee | 6-3 6-2 |
| 2008-04-28 | Gimcheon 25K | R16 | hard | Jin A Lee | 7-5 1-6 6-4 |
| 2006-06-12 | Inchon 25K | R32 | hard | Chin Wei Chan | 6-3 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.