Level, 1 wins each over 2 singles meetings since 2021. Last meeting on 25/11/2021 at W15 Lousada.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 25/11/2021 | W15 Lousada | Round 2 | indoor hard | Ku | 6-0 6-0 |
| 05/11/2021 | W15 Castellon | Quarter-final | clay | Ruiz | 6-2 7-6(5) |
| indoor hard | Ruiz 0 - 1 Ku |
| clay | Ruiz 1 - 0 Ku |
| 2021 | Ruiz 1 - 1 Ku |
122 wins, 97 losses since 2021 (55.7%).
Last matches: D D V D V
201 wins, 115 losses since 2021 (63.6%).
Last matches: D V D D V
Level, 1 wins each over 2 singles meetings since 2021.
On 25/11/2021, at W15 Lousada (Round 2): Yeon Woo Ku won 6-0 6-0.