Momoko Kobori defeated Haruka Kaji 6-3 6-0 in the W25 Hong Kong round of 32 on hard. The upset overturned the form book — Haruka Kaji came in ranked #254, leading the head-to-head 4–0, but Momoko Kobori had been the form player, winning 3 of their last 6 on hard. Momoko Kobori claimed a first win over Haruka Kaji in five meetings, narrowing the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2024-11-22 | W100 Takasaki 1 | R16 | hard | Haruka Kaji | 6-4 6-1 |
| 2023-06-29 | W25 Hong Kong | R16 | hard | Haruka Kaji | 6-2 6-4 |
| 2022-10-02 | W25 Nanao | F | carpet | Haruka Kaji | 3-6 6-3 6-3 |
| 2019-08-24 | W25 Tsukuba | SF | hard | Haruka Kaji | 0-6 7-6(5) 6-2 |
Averages over each player's completed matches in the selected window (50 vs 96). 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