Zdenek Kolar vs Jan Kumstat — Liberec Round of 32

Liberec · CHALLENGER · Round of 32
Zdenek Kolar
CZE1
Zdenek Kolar
#156ATP
1506ELO
1485Clay ELO
$124kYTD
$1.3MCAREER
29 yrs · 183 cm · Right-handed
Last 10 · pre-match
LLLLWLLWWL
1 — 2
Sets
Monday, 27 July 2026 ·
clay
SVIJANY COURT · 3rd on
CZEWC
Jan Kumstat
#347ATP
19 yrs · Right-handed
Last 10 · pre-match
WWWWWWWWWW
Kolar Z.
2-6 6-4 3-6
Kumstat J.
Kolar Z.
2631
Kumstat J.
6462

Jan Kumstat defeated Zdenek Kolar in the Round of 32 of the Liberec tournament on clay, winning 6-2, 4-6, 6-3. Kumstat hit 11 aces to Kolar's 3 and had an 81% first-serve win percentage, compared to Kolar's 62%. Kumstat converted 25% of his break points and won 3 service breaks to Kolar's 1.

Key context

  • Match story: Jan Kumstat closed it out in three sets, 6–2 4–6 6–3.

Head to head

No previous meetings on record.

Statistics

This season
Kolar Z.Kumstat J.
1st serve in·Slight edge
67%
56%
1st serve points won·Slight edge
67%
72%
2nd serve points won·Slight edge
53%
58%
Service points won·Even
63%
66%
Return points won·Even
38%
39%
Break points saved·Clear edge
55%
40%
Aces / match·Dominant
2.8
6.7
Double faults / match·Clear edge
3.3
2.1

Averages over each player's completed matches in the selected window (32 vs 10). ATP, WTA & Challenger.

Win Probability

Pre-match · updated 13:50 UTC
Kolar Z.58%
Kumstat J.42%
Toss-up
50–58%
Slight edge
58–67%
Clear favourite
67–80%
Strong favourite
80%+

Toss-up · Too close to call

Calibrated model · 63% favourite accuracy (2025–26, out-of-sample). Probability is a statistical estimate, not a certainty. How it works.

Umpiry Score

Pre-match
Kolar Z.
5.6
Slight disadvantageUmpiry ScorePartial · surface data limited
Kumstat J.
6.3
Marginal edgeUmpiry ScorePartial · surface data limited
Form & Matchup
5.0No prior meetings
H2H
5.0No prior meetings
3.44 of last 10 on clay
Surface form
6.97 of last 10 on clay
0.0Lost last 3
Win streak
0.0
Fatigue & Travel
7.01 three-setter in 14 days
3-set count
7.01 three-setter in 14 days
Context
5.0Didn't play here last year
Defending pts
5.0Didn't play here last year

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
Kolar Z.Kumstat J.
Freshness·Dominant
99
45

Kolar Z.: 14 days rest · 1 match (14d) · Kumstat J.: 2 days rest · 5 matches, 131 games (7d). Higher means fresher. About

Conditions

Court speed
Slowlow bounce, long rallies
SlowFast
Weather
20°CPartly cloudy
Wind 14 km/hHumidity 55%

Draw