Stefan Kozlov vs J J Wolf, Champaign Challenger 2021, Semifinal

Challenger · Semifinal · Hard · Sat 20 Nov

Final

Stefan Kozlov

WinnerRank #284

Kozlov won in 2 sets · 1h 6m

2–0

Set 16–2

Set 26–3

J J Wolf

LostRank #210

Venue

Atkins Tennis Center

Urbana, USA· Hard

Court speed

What is court speed?

How much the court helps the server, judged from aces and serve points won and adjusted for who played. 100 is the average ATP tournament court that season.

Very slow< 92Monte Carlo, Rome
Slow92–97Roland Garros, Indian Wells
Average97–103US Open, Dubai
Fast103–108Wimbledon, Shanghai
Very fast108+Basel

Challenger and ITF courts usually read lower: partly the venues, partly the balls and conditions at those levels.

How court speed works

Know how fast this court plays before the first serve

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Altitude

231 m

Above sea level

Indoor venue, weather not factored

Low

Match stats

1h 6m

6Aces2

0Double faults6

29Service points won25

8Service games played9

7Service games won4

9Return games played8

0/10%Break points saved38%3/8

5/863%Break points converted100%1/1

Head to head

5Kozlov

5Wolf

10 meetings

Champaign ChallengerSemifinal · 20 Nov 2021HardThis match
Stefan Kozlov
Sets won: 2Set 1: 6Set 2: 6
J J Wolf
Sets won: 0Set 1: 2Set 2: 3
Cleveland ChallengerQuarterfinal · 1 Feb 2025Hard
J J Wolf
Sets won: 2Set 1: 6Set 2: 6
Stefan Kozlov
Sets won: 0Set 1: 1Set 2: 3
Bloomfield Hills ChallengerQuarterfinal · 5 Jul 2024Hard
Stefan Kozlov
Sets won: 2Set 1: 6Set 2: 6
J J Wolf
Sets won: 0Set 1: 4Set 2: 4
San DiegoRound of 32 · 19 Sept 2022Hard
J J Wolf
Sets won: 2Set 1: 6Set 2: 7⁸
Stefan Kozlov
Sets won: 0Set 1: 2Set 2: 6⁶
Charlottesville ChallengerSemifinal · 6 Nov 2021Hard
Stefan Kozlov
Sets won: 2Set 1: 6Set 2: 6¹Set 3: 6
J J Wolf
Sets won: 1Set 1: 1Set 2: 7⁷Set 3: 0
Las Vegas ChallengerFinal · 31 Oct 2021Hard
J J Wolf
Sets won: 2Set 1: 6Set 2: 6
Stefan Kozlov
Sets won: 0Set 1: 4Set 2: 4

Match research

Pro

Everything that shapes this match: each player’s run-in and travel, records side by side, and results against similar opponents and in similar conditions. Better information, better-informed decisions.

Run-inEvery match in the last 28 days, rest days and travel between venues.
Tale of the tapeRecords and serve numbers side by side, filtered by period and surface.
Record by opponent rankingHow each player does against the top 10, top 50 or any ranking range.
Similar conditionsResults in comparable heat, humidity, wind and altitude before scheduled matches.

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Stefan Kozlov vs J J Wolf, Champaign Challenger 2021, Semifinal

Final score

Venue and conditions

Match stats

Head to head

Match research