Ayumi Koshiishi vs Dayeon Back — W15 Gimcheon 1 Round of 32
W15 Gimcheon 1 · ITF · Round of 32
2 — 0
Sets
Wednesday, 12 June 2019 ·
hard
Koshiishi A.7-5 6-2
Back D.
Koshiishi A.
762
Back D.
520
Ayumi Koshiishi defeated Dayeon Back 7-5 6-2 in the W15 Gimcheon 1 round of 32 on hard. The upset overturned the form book — Dayeon Back came in ranked #256, leading the head-to-head 2–0. Ayumi Koshiishi claimed a first win over Dayeon Back in three meetings, narrowing the head-to-head to 2–1.
Key context
- Match story: Ayumi Koshiishi closed it out in two sets, 7–5 6–2.
Head to head
0–2| Date | Tournament | Round | Surface | Winner | Score |
|---|---|---|---|---|---|
| 2025-05-22 | W35 Andong 1 | R16 | hard | Dayeon Back | 6-0 6-3 |
| 2024-03-07 | W35 Nagpur 1 | R16 | clay | Dayeon Back | 6-0 6-1 |
Statistics
This season1st serve in·Even
62%
66%
1st serve points won·Even
58%
62%
2nd serve points won·Even
42%
44%
Service points won·Even
52%
56%
Return points won·Even
45%
49%
Break points saved·Even
49%
53%
Aces / match·Slight edge
2.1
0.9
Double faults / match·Even
2.5
2.5
Averages over each player's completed matches in the selected window (44 vs 100). ATP, WTA & Challenger.