Rina Saigo defeated Yukina Saigo 6-1 6-0 in the W35 Changwon 1 q64 on hard. Rina Saigo extended the head-to-head to 2–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2020-02-02 | W25 Nonthaburi | Q64 | hard | Rina Saigo | 6-2 6-2 |
| 2019-08-01 | W15 Knokke 1 | R16 | clay | Yukina Saigo | 4-6 6-4 6-4 |
Averages over each player's completed matches in the selected window. ATP, WTA & Challenger.