Stefan Kozlov vs Michael Zheng — Charleston CH Qualifying Round 1

Charleston CH · CHALLENGER · Qualifying Round 1
Stefan Kozlov
USA11
Stefan Kozlov
#296ATP
1429ELO
1408Hard ELO
28 yrs · 183 cm · Right-handed
Last 10 · pre-match
LWWWLLWWLW
2 — 0
Sets
Monday, 25 September 2023
hard
USA
Michael Zheng
#121ATP
1695ELO
1672Hard ELO
$310kYTD
$502kCAREER
22 yrs · 188 cm · Right-handed
Last 10 · pre-match
LWWWWWLLLW
Kozlov S.
7-5 6-3
Zheng M.
Kozlov S.
762
Zheng M.
530

Stefan Kozlov defeated Michael Zheng 7-5 6-3 in the Charleston CH qualifying round 1 on hard. The upset overturned the form book — Michael Zheng came in ranked #121.

Key context

  • Match story: Stefan Kozlov closed it out in two sets, 7–5 6–3.

Head to head

No previous meetings on record.

Serve vs return

This season
Kozlov S.serving70% hold

wins 58% of points on serve vs Zheng M.

Zheng M.serving74% hold

wins 60% of points on serve vs Kozlov S.

Serve advantage — Zheng M.

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
Kozlov S.Zheng M.
1st serve in·Slight edge
64%
58%
1st serve points won·Slight edge
66%
72%
2nd serve points won·Slight edge
48%
53%
Service points won·Slight edge
59%
64%
Return points won·Even
43%
40%
Break points saved·Slight edge
59%
64%
Aces / match·Clear edge
2.3
4.6
Double faults / match·Dominant
3.7
1.7

Averages over each player's completed matches in the selected window (138 vs 69). ATP, WTA & Challenger.

Umpiry Score

Pre-match
Kozlov S.
4.6
Heavy underdogUmpiry Score
Zheng M.
6.0
Even matchUmpiry Score
  • Extended break: 56 days (−0.7)
Form & Matchup
1.5Hard Elo 1408
Surface ELO
8.5+263 Hard Elo edge
1.3Overall Elo 1429
ELO gap
8.7Overall Elo 1695
5.0No prior meetings
H2H
5.0
2.4
Surface form
5.2
0.0Lost last 5
Win streak
0.0Lost last 3
Fatigue & Travel
8.6
Minutes 14d
7.0
3-set count
7.0
Prev. match
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
Kozlov S.Zheng M.
Freshness·Clear edge
69
92

Kozlov S.: 4 days rest · 3 matches, 72 games (7d) · Zheng M.: 11 days rest · 2 matches (14d). Higher means fresher. About

Conditions

Court speed
Mediumbalanced pace
SlowFast
Q2
Escobedo E.[4]
Rodenas P.
4-66-16-3
Kirchheimer S.[6]
Moller E.[7]
6-16-3
Holmgren A.[8]
Gomez F.[5]
6-07-5
Dostanic S.
Kozlov S.[11]
6-26-1
Mayo A.[9]
King D.
6-26-4
Kwiatkowski T.[10]
Mansouri S.[1]
3-66-27-5
Q1
Mayo A.[9]
Dlimi Y.
6-13-67-65
Kozlov S.[11]
Zheng M.
7-56-3
Escobedo E.[4]
Boulais J.
7-666-3
Mansouri S.[1]
Sinha A.
7-56-717-67
Rodenas P.
Ponwith N.[12]
6-756-17-65
Moller E.[7]
Vasa E.
7-56-746-4
Holmgren A.[8]
Schnur B.
6-787-57-65
Dostanic S.
Zhu E.[3]
4-67-56-0
King D.
Langmo C.[2]
4-67-657-63
Kwiatkowski T.[10]
Young D.
6-46-4