Haruka Kaji defeated Rina Saigo 6-0 6-4 in the W100 Takasaki quarter-final on hard. The result followed the form book — Haruka Kaji came in ranked #260, leading the head-to-head 4–0, defending last year's round of 32. Haruka Kaji extended the head-to-head to 5–0.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2024-08-08 | W35 Roehampton 2 | R16 | hard | Haruka Kaji | 2-6 6-2 6-1 |
| 2024-03-27 | W50 Kofu 1 | R32 | hard | Haruka Kaji | 7-6(3) 6-2 |
| 2023-11-21 | W100 Takasaki 2 | Q16 | hard | Haruka Kaji | 6-3 6-7(4) 6-3 |
| 2022-10-01 | W25 Nanao | SF | carpet | Haruka Kaji | 4-6 6-3 6-4 |
Averages over each player's completed matches in the selected window (31 vs 32). 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