Cheng Yu Yu defeated Kuan Yi Lee 7-6 6-2 in the Hong Kong F1 qualifying round on hard. The upset overturned the form book — Kuan Yi Lee came in leading the head-to-head 3–0, but Cheng Yu Yu had been the form player, winning 2 of their last 5 on hard. Cheng Yu Yu claimed a first win over Kuan Yi Lee in four meetings, narrowing the head-to-head to 3–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2019-08-28 | M15 Hua Hin 2 | R32 | hard | Kuan Yi Lee | 2-6 6-2 7-6(6) |
| 2017-08-07 | Thailand F5 | R16 | hard | Kuan Yi Lee | 2-2 |
| 2017-07-31 | Thailand F4 | SF | hard | Kuan Yi Lee | 6-4 6-2 |
Averages over each player's completed matches in the selected window (89 vs 200). 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. About