Lukas Klein vs Jesper De Jong — Istanbul CH Semi-final

Istanbul CH · CHALLENGER · Semi-final
Lukas Klein
SVK3
Lukas Klein
#185ATP
1601ELO
1535Hard ELO
$64kYTD
$1.3MCAREER
28 yrs · 193 cm · Right-handed
Last 10 · pre-match
LWLLWWWWLW
2 — 1
Sets
Monday, 4 September 2023
hard
Jesper De Jong
NED2
Jesper De Jong
#73ATP
1711ELO
1607Hard ELO
$612kYTD
$2.3MCAREER
26 yrs · 180 cm · Right-handed
Last 10 · pre-match
WLWLWWWWWL
Klein L.
7-6 6-7 7-6
De Jong J.
Klein L.
7762772
De Jong J.
6277651

Lukas Klein defeated Jesper De Jong 7-6 6-7 7-6 in the Istanbul CH semi-final on hard. The upset overturned the form book — Jesper De Jong came in ranked #73.

Key context

Head to head

No previous meetings on record.

Serve vs return

This season
Klein L.serving82% hold

wins 64% of points on serve vs De Jong J.

De Jong J.serving83% hold

wins 65% of points on serve vs Klein L.

Even serve battle

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

Klein L.De Jong J.
—
Serve
23
—
Return
17

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

Statistics

This season
Klein L.De Jong J.
1st serve in·Slight edge
66%
59%
1st serve points won·Even
72%
72%
2nd serve points won·Even
51%
50%
Service points won·Even
65%
63%
Return points won·Even
37%
40%
Break points saved·Even
63%
59%
Aces / match·Even
5.4
5.6
Double faults / match·Even
3.0
3.0

Averages over each player's completed matches in the selected window (186 vs 199). ATP, WTA & Challenger.

Clutch

Under pressure
Klein L.De Jong J.
Clutch Rating·Clear edge
39
57
Break points saved·Even
92
90
Break points won·Dominant
1
37
Deciding sets·Slight edge
63
69
Tiebreaks·Dominant
31
62

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

Umpiry Score

Pre-match
Klein L.
4.5
Heavy underdogUmpiry Score
  • Extended break: 35 days (−0.7)
De Jong J.
7.0
Strong advantageUmpiry Score
Form & Matchup
4.6Hard Elo 1535
Surface ELO
5.4+72 Hard Elo edge
4.6Overall Elo 1601
ELO gap
5.4Overall Elo 1711
5.0No prior meetings
H2H
5.0
3.0
Surface form
7.7
Win streak
9.05-match win streak
Fatigue & Travel
Prev. match
8.0
6.0
Surface transition
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
Klein L.De Jong J.
Freshness·
—
78

De Jong J.: 1 day rest · 1 match, 25 games (7d). Higher means fresher. About

Conditions

Court speed
Medium-slowfavours grinders
SlowFast
Final
Dzumhur D.[7]
Klein L.[3]
7-656-3
Semi-finals
Klein L.[3]
De Jong J.[2]
7-626-727-65
Dzumhur D.[7]
Hardt N.
6-46-3
Quarter-finals
Hardt N.
Celikbilek A.
1-67-654-1
Klein L.[3]
Yevseyev D.
7-656-737-62
Dzumhur D.[7]
Prizmic D.[4]
6-36-737-5
De Jong J.[2]
Mpetshi Perricard G.
7-56-4
R16
Hardt N.
Tomic B.
6-23-67-66
Mpetshi Perricard G.
Mayot H.[6]
6-716-36-3
Klein L.[3]
Kirkin E.
6-36-4
Prizmic D.[4]
Bicknell B.
4-66-36-2
Yevseyev D.
Kirci K.
6-27-64
Celikbilek A.
Oliel Y.
2-66-46-3
De Jong J.[2]
Monday J.
7-56-1
Dzumhur D.[7]
Erel Y.
7-56-3
R32
Erel Y.
Cukierman D.
6-21-0
Kirci K.
Borg L.
6-13-66-3
Bicknell B.
Martineau M.
6-757-636-3
Kirkin E.
Gengel M.
6-16-2
Prizmic D.[4]
Wessels L.
6-26-737-5
Oliel Y.
Copil M.
6-26-4
Klein L.[3]
Damm M.
6-44-67-5
Mayot H.[6]
Dougaz A.
7-647-5
Mpetshi Perricard G.
Ilkel C.
7-56-4
Yevseyev D.
Gombos N.[8]
4-66-16-2
Dzumhur D.[7]
Duran T.
6-46-1
Celikbilek A.
Onclin G.[5]
6-16-0
Monday J.
Zuk K.
4-66-16-4
De Jong J.[2]
Ilhan M.
6-26-736-2
Hardt N.
Kwon S.[1]
6-06-1
Tomic B.
Mansouri S.
6-36-4