Dayeon Back vs Ayumi Koshiishi — W35 Andong Round of 16

W35 Andong · CHALLENGER · Round of 16
KOR
Dayeon Back
#260WTA
24 yrs
Last 10 · pre-match
WWWWWWWWWW
0 — 0
Sets
Monday, 19 May 2025
hard
JPN
Ayumi Koshiishi
#691WTA
1224ELO
1213Hard ELO
25 yrs
Last 10 · pre-match
LWWLLLLWLW
Back D.
6-0 6-3
Koshiishi A.
Back D.
662
Koshiishi A.
03–

Dayeon Back defeated Ayumi Koshiishi 6-0 6-3 in the W35 Andong round of 16 on hard.

Key context

Head to head

No previous meetings on record.

Serve vs return

This season
Back D.serving50% hold

wins 50% of points on serve vs Koshiishi A.

Koshiishi A.serving31% hold

wins 42% of points on serve vs Back D.

Baseline battle — serve is shaky, expect plenty of breaks

Each player's serve crossed against the other's return, converted to expected hold of serve. Recent completed matches, ATP, WTA & Challenger. About

Statistics

This season
Back D.Koshiishi A.
1st serve in·Slight edge
67%
62%
1st serve points won·Even
62%
59%
2nd serve points won·Even
44%
41%
Service points won·Even
56%
52%
Return points won·Even
50%
46%
Break points saved·Even
52%
48%
Aces / match·Slight edge
0.9
2.2
Double faults / match·Even
2.5
2.7

Averages over each player's completed matches in the selected window (95 vs 44). ATP, WTA & Challenger.

Umpiry Score

Pre-match
Back D.
6.3
Marginal edgeUmpiry ScorePartial · surface data limited
Koshiishi A.
6.2
Even matchUmpiry ScorePartial · surface data limited
Form & Matchup
5.0No prior meetings
H2H
5.0
6.1
Surface form
5.3
0.0
Win streak
Fatigue & Travel
0.0
3-set count
7.0
Context
5.0
Defending pts
5.0

The Umpiry Score combines match-context factors — matchup, form, fatigue, travel and motivation — into a single 0–10 score, updated daily. Read how it works.

Conditions

Court speed
Slowlow bounce, long rallies
SlowFast

Draw

Final
Tjen J.
Ma Y.
6-46-2
Semi-finals
Ma Y.
You X.
7-56-2
Tjen J.
Matsuda M.
7-646-3
Quarter-finals
Matsuda M.
Lee Y.
7-636-3
Ma Y.
Shimizu E.
6-36-2
R16
You X.
Jeong B.
6-36-2
Back D.
Koshiishi A.
6-06-3
Ma Y.
Lee G.
6-16-2
Tjen J.
Chaudhari V.
6-26-0
Lee Y.
Ku Y.
7-677-5
Park S.
Saigo R.
6-46-2
Shimizu E.
Kim Y.
6-36-3
Matsuda M.
Yamazaki I.
6-26-0
R32
Koshiishi A.
Lee E.
6-36-1
Ku Y.
Zheng W.
6-26-3
Tjen J.
Shimizu A.
6-06-1
Kim Y.
Li Z.
2-2
Jeong B.
Zolotareva A.
3-66-36-2
Lee G.
Han H.
6-37-5
Lee Y.
Wong H.
6-36-2
Matsuda M.
Sato H.
6-46-4
Shimizu E.
Varaksina A.
6-26-1
Yamazaki I.
Jang G.
6-37-5
Park S.
Chong E.
6-16-1
Back D.
Jeong S.
6-36-1
Ma Y.
Yuan C.
6-36-1
Chaudhari V.
Abe H.
4-66-26-1
You X.
Lu J.
6-36-1
Saigo R.
Kuramochi M.
6-35-4