Dayeon Back defeated Carol Young Suh Lee 3-6 6-2 6-4 in the W15 Daegu 1 quarter-final on hard. Dayeon Back extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-10-11 | W35 Kunshan 1 | SF | hard | Carol Young Suh Lee | 3-6 7-5 6-3 |
| 2023-07-14 | W15 Nakhon Si Thammarat 3 | QF | hard | Dayeon Back | 6-3 6-2 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.