Dayeon Back vs Ayumi Koshiishi — W35 Andong Round of 16

W35 Andong · CHALLENGER · Round of 16
KOR
Dayeon Back
#291WTA
24 yrs
Last 10
LWWWLWWWWL
0 — 0
Sets
Monday, 19 May 2025
hard
JPN
Ayumi Koshiishi
#638WTA
1224ELO
1213Hard ELO
25 yrs
Last 10
LWWLLLLWLW

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
5.0
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.

Back D.
662
Koshiishi A.
03–

Head to head

1–0
DateTournamentRoundSurfaceWinnerScore
2024-03-04W35 NagpurR16clayDayeon Back6-0 6-1

Statistics

Recent form
Back D.Koshiishi A.
69%1st serve in+6%63%
59%1st serve points won59%
45%2nd serve points won+4%41%
55%Service points won+3%52%
50%Return points won+6%44%
50%Break points saved+2%48%
0.7Aces / match+1.92.6
2.5Double faults / match+0.12.6

Averages from each player's recent completed matches (20 vs 20). ATP, WTA & Challenger.

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