Kokoro Isomura vs San Hui Sin — Zhangjiagang CH Quarter-final

Zhangjiagang CH · CHALLENGER · Quarter-final
JPN
Kokoro Isomura
#562ATP
1206ELO
1176Hard ELO
23 yrs · 175 cm · Right-handed
Last 10 · pre-match
LWLLLWLWLW
2 — 1
Sets
Monday, 25 August 2025
hard
KOR
San Hui Sin
1265ELO
1242Hard ELO
29 yrs · 178 cm · Right-handed
Last 10 · pre-match
LWWLLLLWLL
Isomura K.
2-6 6-2 6-4
Sin S.
Isomura K.
2662
Sin S.
6241

Kokoro Isomura defeated San Hui Sin 2-6 6-2 6-4 in the Zhangjiagang CH quarter-final on hard.

Key context

Head to head

No previous meetings on record.

Serve vs return

This season
Isomura K.serving71% hold

wins 59% of points on serve vs Sin S.

Sin S.serving67% hold

wins 57% of points on serve vs Isomura K.

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
Isomura K.Sin S.
1st serve in·Even
64%
62%
1st serve points won·Slight edge
68%
62%
2nd serve points won·Slight edge
49%
44%
Service points won·Slight edge
61%
55%
Return points won·Even
38%
42%
Break points saved·Slight edge
61%
52%
Aces / match·Even
2.0
2.0
Double faults / match·Clear edge
3.1
2.1

Averages over each player's completed matches in the selected window (41 vs 28). ATP, WTA & Challenger.

Umpiry Score

Pre-match
Isomura K.
5.3
Clear underdogUmpiry Score
  • Extended break: 28 days (−0.3)
Sin S.
5.5
Slight disadvantageUmpiry Score
  • Extended break: 28 days (−0.3)
Form & Matchup
4.2Hard Elo 1176
Surface ELO
5.8+66 Hard Elo edge
4.3Overall Elo 1206
ELO gap
5.7Overall Elo 1265
5.0No prior meetings
H2H
5.0
5.0
Surface form
4.3
0.0Lost last 2
Win streak
0.0
Fatigue & Travel
7.0
Prev. match
9.0
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.

Freshness

Recent load
Isomura K.Sin S.
Freshness·
82
—

Isomura K.: 1 day rest · 1 match, 23 games (7d). Higher means fresher. About

Conditions

Court speed
Fastbig serves, short points
SlowFast
Final
Shimabukuro S.[3]
Crawford O.[6]
6-33-67-5
Semi-finals
Shimabukuro S.[3]
Uchiyama Y.[5]
6-37-65
Crawford O.[6]
Isomura K.
7-616-0
Quarter-finals
Uchiyama Y.[5]
Uchida K.
6-36-4
Isomura K.
Sin S.
2-66-26-4
Shimabukuro S.[3]
Simakin I.[7]
6-46-3
Crawford O.[6]
Tokuda R.
7-613-66-2
R16
Crawford O.[6]
Moriya H.
6-34-66-4
Tokuda R.
Sekulic P.
6-46-4
Sin S.
Sun F.[4]
6-36-1
Isomura K.
Cui J.
3-66-27-69
Uchiyama Y.[5]
Huang T.
6-26-4
Shimabukuro S.[3]
Peliwo F.
6-36-4
Uchida K.
Noguchi R.[2]
6-17-64
Simakin I.[7]
Charlton J.
6-46-4
R32
Sekulic P.
Tomic B.[1]
6-11-67-66
Charlton J.
Te R.
6-46-776-4
Tokuda R.
Binda A.
5-76-36-3
Moriya H.
Yevseyev D.
6-24-66-4
Isomura K.
Fomin S.
6-36-2
Simakin I.[7]
Wu T.
6-47-61
Peliwo F.
Bar Biryukov P.
6-16-2
Uchiyama Y.[5]
Kikuchi Y.
6-25-76-1
Uchida K.
Castelnuovo L.
7-646-3
Noguchi R.[2]
Xiao L.
7-666-1
Sun F.[4]
Mo Y.
3-66-36-4
Crawford O.[6]
Imamura M.
6-36-2
Sin S.
Shin W.
7-57-64
Cui J.
Gea A.[8]
5-77-646-0
Shimabukuro S.[3]
Watt J.
6-43-66-2
Huang T.
Uesugi K.
6-16-743-2