Dayeon Back leads 5 to 1 over 6 singles meetings since 2023. Last meeting on 31/10/2025 at W35 Makinohara.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 31/10/2025 | W35 Makinohara | Quarter-final | carpet | Back | 6-3 6-4 |
| 09/10/2025 | W35 Kunshan | Round 2 | hard | Back | 7-5 6-1 |
| 01/06/2025 | W15 Daegu | Final | hard | Back | 5-6 |
| 16/03/2025 | W35 Nonthaburi | Final | hard | Lee | 3-6 4-6 |
| 29/09/2024 | W15 Yeongwol | Final | hard | Back | 6-2 6-1 |
| 08/03/2023 | W15 Sharm ElSheikh | Round 1 | hard | Back | 1-4 |
| carpet | Back 1 - 0 Lee |
| hard | Back 4 - 1 Lee |
| 2025 | Back 3 - 1 Lee |
| 2024 | Back 1 - 0 Lee |
| 2023 | Back 1 - 0 Lee |
189 wins, 90 losses since 2021 (67.7%).
Last matches: D D V D D
133 wins, 91 losses since 2021 (59.4%).
Last matches: D V D V V
Dayeon Back leads 5 to 1 over 6 singles meetings since 2023.
On 31/10/2025, at W35 Makinohara (Quarter-final): Dayeon Back won 6-3 6-4.