Zdenek Kolar vs Zhizhen Zhang — Koblenz CH Round of 16

Koblenz CH · CHALLENGER · Round of 16
CZE
Zdenek Kolar
#162ATP
1510ELO
1434Hard ELO
$72kYTD
$1.3MCAREER
29 yrs · 183 cm · Right-handed
Last 10
LWLWLWLWWW
2 — 1
Sets
Monday, 30 January 2023
hard
CHN
Zhizhen Zhang
[1]
#224ATP
1673ELO
1638Hard ELO
29 yrs · 193 cm · Right-handed
Last 10
LLLWWLLLWL

Umpiry Score

Pre-match
Kolar Z.
5.2
Clear underdogUmpiry Score
Zhang Z.
6.4
Marginal edgeUmpiry Score
Form & Matchup
2.2Hard Elo 1434
Surface ELO
7.8+204 Hard Elo edge
2.6Overall Elo 1510
ELO gap
7.4Overall Elo 1673
5.0
H2H
5.0
4.5
Surface form
3.9
Win streak
0.0Lost last 4
Fatigue & Travel
5.9
Minutes 14d
7.9
0.0
3-set count
7.0
7.0
Prev. match
2.0
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.

Kolar Z.
3662
Zhang Z.
6331

Head to head

1–0
DateTournamentRoundSurfaceWinnerScore
2026-05-12Oeiras 6R32clayZdenek Kolar6-3 6-4

Statistics

Recent form
Kolar Z.Zhang Z.
67%1st serve in+3%64%
67%1st serve points won+6%73%
54%2nd serve points won+4%50%
63%Service points won+2%65%
39%Return points won+6%33%
56%Break points saved+10%66%
2.4Aces / match+5.27.6
3.3Double faults / match+1.81.5

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

Draw

Final
Safiullin R.[2]
Pospisil V.[3]
6-27-5
Semi-finals
Safiullin R.[2]
Collignon R.
5-76-36-0
Pospisil V.[3]
Kolar Z.
6-16-3
Quarter-finals
Safiullin R.[2]
Vatutin A.
6-31-66-2
Pospisil V.[3]
Wessels L.
6-46-2
Kolar Z.
Muller A.[7]
7-654-67-63
Collignon R.
Marterer M.[4]
5-2
R16
Marterer M.[4]
Andreev A.
6-36-3
Muller A.[7]
Choinski J.
6-36-747-5
Wessels L.
Grenier H.[5]
6-46-3
Pospisil V.[3]
Rosenkranz M.
7-667-62
Safiullin R.[2]
Escoffier A.
6-34-67-62
Kolar Z.
Zhang Z.[1]
3-66-36-3
Collignon R.
Laaksonen H.
7-56-4
Vatutin A.
Broady L.[6]
6-26-3
R32
Marterer M.[4]
Sachko V.
7-56-2
Zhang Z.[1]
Squire H.
6-15-76-4
Muller A.[7]
Rehberg M.
6-46-4
Pospisil V.[3]
Nava E.
7-56-2
Grenier H.[5]
Gerch L.
6-26-2
Rosenkranz M.
Lokoli L.
4-66-46-3
Choinski J.
Yevseyev D.
6-41-66-2
Wessels L.
Hoang A.
7-663-66-2
Kolar Z.
Bellier A.
6-26-4
Laaksonen H.
Nardi L.
7-696-3
Vatutin A.
Haerteis J.
7-666-1
Safiullin R.[2]
Blancaneaux G.
5-76-36-1
Escoffier A.
Topo M.
6-46-757-66
Andreev A.
Masur D.
7-56-3
Collignon R.
Brouwer G.[8]
5-77-626-3
Broady L.[6]
Haase R.
7-626-1