Eunhye Lee defeated Dayeon Back 6-3 6-4 in the W35 Nonthaburi 1 final on hard. The upset overturned the form book — Dayeon Back came in ranked #256, leading the head-to-head 5–0. Eunhye Lee claimed a first win over Dayeon Back in six meetings, narrowing the head-to-head to 5–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-10-31 | W35 Makinohara 1 | QF | carpet | Dayeon Back | 6-3 6-4 |
| 2025-10-09 | W35 Kunshan 1 | R16 | hard | Dayeon Back | 7-5 6-1 |
| 2025-06-01 | W15 Daegu 1 | F | hard | Dayeon Back | 5-6 |
| 2024-09-29 | W15 Yeongwol 1 | F | hard | Dayeon Back | 6-2 6-1 |
| 2023-03-08 | W15 Sharm ElSheikh 6 | R32 | hard | Dayeon Back | 4-1 |
Averages over each player's completed matches in the selected window (70 vs 93). 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