Janice Tjen vs Yeon Woo Ku — W35 Osaka Quarter-final

W35 Osaka · CHALLENGER · Quarter-final
INA
Janice Tjen
#39WTA
1658ELO
1684Hard ELO
$630kYTD
$984kCAREER
24 yrs · 171 cm · Right-handed
Last 10 · pre-match
LWLLLLWLWL
0 — 0
Sets
Monday, 7 April 2025
hard
KOR
Yeon Woo Ku
1519ELO
1500Hard ELO
23 yrs
Last 10 · pre-match
LLWWWWWWWW
Tjen J.
6-1 6-2
Ku Y.
Tjen J.
662
Ku Y.
12–

Janice Tjen defeated Yeon Woo Ku 6-1 6-2 in the W35 Osaka quarter-final on hard.

Key context

Head to head

No previous meetings on record.

Serve vs return

This season
Tjen J.serving56% hold

wins 53% of points on serve vs Ku Y.

Ku Y.serving52% hold

wins 51% of points on serve vs Tjen J.

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

Serve & return on hard

Tjen J.Ku Y.
53
Serve
—
13
Return
—

Per-surface Serve / Return Rating (0–100, percentile within the hard field, opponent-adjusted over 52 weeks). About

Statistics

This season
Tjen J.Ku Y.
1st serve in·Slight edge
62%
67%
1st serve points won·Slight edge
69%
61%
2nd serve points won·Even
51%
47%
Service points won·Slight edge
62%
57%
Return points won·Even
46%
49%
Break points saved·Even
56%
56%
Aces / match·Clear edge
3.4
1.1
Double faults / match·Slight edge
2.7
3.3

Averages over each player's completed matches in the selected window (97 vs 89). ATP, WTA & Challenger.

Clutch

Under pressure
Tjen J.Ku Y.
Clutch Rating·Dominant
78
50
Break points saved·Dominant
84
51
Break points won·Even
85
86
Deciding sets·Clear edge
75
63
Tiebreaks·
99
—

Performance in the biggest moments — break points, deciding sets and tiebreaks (0–100, higher is better). About

Umpiry Score

Pre-match
Tjen J.
7.1
Strong advantageUmpiry Score
  • Extended break: 42 days (−0.7)
Ku Y.
3.8
Heavy underdogUmpiry Score
  • Recent retirement (−1.5)
Form & Matchup
9.9+184 Hard Elo edge
Surface ELO
0.1Hard Elo 1500
10.0Overall Elo 1658
ELO gap
0.0Overall Elo 1519
5.0No prior meetings
H2H
5.0
8.5
Surface form
7.6
0.0
Win streak
7.04-match win streak
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
Tjen J.Ku Y.
Freshness·Even
97
100

Tjen J.: 13 days rest · 1 match (14d) · Ku Y.: 21 days rest. Higher means fresher. About

Conditions

Court speed
Mediumbalanced pace
SlowFast

Draw

Final
Ma Y.
Liang E.
6-44-66-4
Semi-finals
Ma Y.
Tjen J.
6-16-1
Liang E.
Kuramochi M.
7-56-4
Quarter-finals
Ma Y.
Shimizu E.
3-66-47-5
Tjen J.
Ku Y.
6-16-2
Kuramochi M.
Guo H.
6-40-67-69
Liang E.
Kaji H.
6-16-2
R16
Ku Y.
Sakatsume H.
7-636-2
Kuramochi M.
Cabrera L.
3-66-47-5
Shimizu E.
Imamura S.
6-36-2
Guo H.
Wang M.
6-26-1
Tjen J.
Ishii S.
6-06-3
Kaji H.
Zhu L.
3-66-26-4
Liang E.
Yao X.
6-36-4
Ma Y.
Shimizu A.
6-26-4
R32
Liang E.
Kinoshita H.
6-46-2
Guo H.
Okamura K.
4-66-36-3
Sakatsume H.
Kawaguchi N.
6-26-2
Shimizu A.
Hartono A.
6-47-64
Kaji H.
Hosogi S.
6-16-2
Shimizu E.
Jang S.
6-26-4
Ishii S.
Saigo R.
6-07-5
Yao X.
Zheng W.
6-25-76-4
Cabrera L.
Arakawa H.
6-46-3
Imamura S.
Sato H.
6-26-2
Ma Y.
Koshiishi A.
3-66-46-1
Tjen J.
Akita S.
6-27-5
Wang M.
Kawamura M.
7-57-5
Ku Y.
Yamaguchi K.
6-46-3
Zhu L.
Matsuda R.
6-27-5
Kuramochi M.
Sema E.
5-76-36-2