Chin Wei Chan defeated So Jung Kim 6-3 6-3 in the Tsukuba 25K round of 16 on hard. The upset overturned the form book — So Jung Kim came in leading the head-to-head 3–1, but Chin Wei Chan had been the form player, winning 6 of their last 9 on hard. Chin Wei Chan narrowed the head-to-head to 3–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2012-09-10 | Ningbo 100K | Q32 | hard | Chin Wei Chan | 6-4 6-4 |
| 2012-08-27 | Tsukuba 25K | R16 | hard | So Jung Kim | 6-0 6-3 |
| 2007-05-28 | Gunma 25K | R32 | carpet | So Jung Kim | 7-5 6-3 |
| 2004-04-12 | Yamaguchi 10K | F | clay | So Jung Kim | 7-6(7) 6-2 |
Averages over each player's completed matches in the selected window (14 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