Ayano Shimizu defeated Mei Yamaguchi 6-4 2-6 6-3 in the W100 Gifu round of 32 on hard. The upset overturned the form book — Mei Yamaguchi came in ranked #261, defending last year's round of 16, but Ayano Shimizu had been the form player, winning 4 of their last 7 on hard. Ayano Shimizu extended the head-to-head to 4–1.
| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2024-11-09 | W35 Hamamatsu 1 | SF | carpet | Mei Yamaguchi | 4-6 6-4 6-0 |
| 2024-06-28 | W35 Taipei 2 | QF | hard | Ayano Shimizu | 6-4 6-1 |
| 2023-10-05 | W25 Makinohara | R16 | carpet | Ayano Shimizu | 6-3 2-6 7-5 |
| 2023-09-03 | W100 Tokyo 1 | Q32 | hard | Ayano Shimizu | 6-3 7-5 |
Averages over each player's completed matches in the selected window (16 vs 31). 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