Yan Bai defeated Duck Hee Lee 6-3 7-6 in the Gwangju CH qualifying round 1 on hard. The upset overturned the form book — Duck Hee Lee came in ranked #977, leading the head-to-head 2–1, defending last year's round of 32. Yan Bai narrowed the head-to-head to 2–2.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2015-08-10 | China F13 | QF | hard | Duck Hee Lee | 6-2 |
| 2015-05-25 | China F6 | SF | hard | Yan Bai | 6-4 6-1 |
| 2013-05-20 | China F5 | QF | hard | Duck Hee Lee | 4-1 |
Averages over each player's completed matches in the selected window (38 vs 36). ATP, WTA & Challenger.
Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About
Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About