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 #275, 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·Slight edge
62%
67%
1st serve points won·Even
60%
62%
2nd serve points won·Even
43%
44%
Service points won·Even
54%
56%
Return points won·Even
47%
49%
Break points saved·Even
51%
52%
Aces / match·Clear edge
2.3
0.8
Double faults / match·Clear edge
3.1
2.3
Averages over each player's completed matches in the selected window (200 vs 200). ATP, WTA & Challenger.