ATP · Rank #292

Stefan Kozlov

28yrs 1.83 m 79 kg Right #103Peak Rank

60.5%Accuracy

Matches Analyzed

Recent Form

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Challenger Columbus USA Hard Challenger Columbus USA (Hard) 1

Challenger San Diego 2 USA Hard Challenger San Diego 2 USA (Hard) 1

2 ▴1.45

2 ▴1.45

Challenger Tiburon USA Hard Challenger Tiburon USA (Hard) 1

1 ▴1.5

1 ▴1.5

Challenger Brownsburg USA Hard Challenger Brownsburg USA (Hard) 1

2 ▾1.54

2 ▾1.54

ATP Washington USA Qualifying Hard ATP Washington USA Qualifying (Hard) 1

1 ▴1.19

1 ▴1.19

Challenger Bloomfield Hills USA Hard Challenger Bloomfield Hills USA (Hard) 3

1 ▴1.49

1 ▴1.49

1 ▾1.4

1 ▾1.4

1 ▾1.08

1 ▾1.08

Challenger Pozoblanco Spain Hard Challenger Pozoblanco Spain (Hard) 1

1 ▴1.61

1 ▴1.61

Challenger Newport USA Grass Challenger Newport USA (Grass) 3

2 ▴1.23

O17.5 ▾1.36

2 ▾2.7

O20.5 ▾1.68

2 ▾1.79

2 ▾1.79

Challenger Savannah USA Clay Challenger Savannah USA (Clay) 2

1 ▴1.81

1 ▴1.81

1 ▾1.75

O21.5 1.8

Challenger Tallahassee USA Clay Challenger Tallahassee USA (Clay) 3

1 ▾1.6

1 ▾1.6

2 ▾1.55

2 ▾1.55

1 ▾1.22

1 ▾1.22

Challenger Mexico City Mexico Clay Challenger Mexico City Mexico (Clay) 2

1 ▾1.42

O19.5 ▴1.51

2 ▴1.65

O19.5 ▴1.51

Challenger San Luis Potosi Mexico Clay Challenger San Luis Potosi Mexico (Clay) 1

1 ▾1.14

1 ▾1.14

Challenger Morelia Mexico Hard Challenger Morelia Mexico (Hard) 1

2 ▾2.37

U23.5 ▾1.67

Record by surface

Hard

17-17

Clay

6-5

Grass

3-0

Overall 26-22

Our AI on this player 26 correct of 43

From the matches in our database

Most-played opponents

Alan Magadan 3 meetings 1-2 Tyler Zink 2 meetings 2-0 Raphael Perot 2 meetings 2-0 Aidan Mayo 2 meetings 2-0 Darwin Blanch 2 meetings 1-1

About Stefan Kozlov

Stefan Kozlov is a 28-year-old right-handed professional tennis player, currently ranked world No. 292. That is below a career-high of world No. 103. The serve is the vulnerable side, at 3.4 double faults per match and 67.3% of first-serve points won. Breaking is the real weapon here: 27.8% of break chances get taken. The record is spread evenly across surfaces — Hard 17-17, Clay 6-5, Grass 3-0.

Lately it has not been coming together — 4 defeats in the last 5 outings. The longest match we have on record ran to 34 games, against A. Mayo. Predictions cover match winner and score, alongside serve, return and break-point statistics. Most recently seen in our data at Challenger Columbus USA.

Serve & Return

First Serve %

63.1%

1st Serve Won

60.7%

2nd Serve Won

50.3%

Aces / Match

1.8

Double Faults / Match

2.4

Break Pts Saved

55.8%

Break Pts Converted

25%

Return Pts Won

38.5%

Service Hold %

56.9%

Total Pts Won

47.7%

Records Last 12 months

Titles

Finals

Semis or better

Events played

Tournament Results 1 title

Valencia, Spain Challenger Qualifying

Acapulco ATP Qualifying Washington ATP Qualifying

Deepest runs first, not by date

Season by season

2026

2026so far

19–18

Won-lost

Matches

4–6

Tiebreaks

2.6

Aces / Match

3.5

Double Faults / Match

First Serve % 60.2%

1st Serve Won 66.1%

2nd Serve Won 50.5%

Break points won 38.6%

Break Pts Saved 58.8%

2025

20–9

Won-lost

Matches

2–3

Tiebreaks

1.6

Aces / Match

1.4

Double Faults / Match

First Serve % 67.5%

1st Serve Won 60.4%

2nd Serve Won 47.1%

Break points won 51.6%

Break Pts Saved 59.2%

2024

37–19

Won-lost

Matches

11–5

Tiebreaks

1.9

Aces / Match

4.3

Double Faults / Match

First Serve % 65.4%

1st Serve Won 65.6%

2nd Serve Won 48.9%

Break points won 44.3%

Break Pts Saved 60.1%

2023

0–1

Won-lost

Matches

—

Tiebreaks

Aces / Match

Double Faults / Match

First Serve % 74.6%

1st Serve Won 60%

2nd Serve Won 35.3%

Break points won 100%

Break Pts Saved 69.2%

Season totals from the tour feed, singles only. The won-lost line is the tour's own count and can differ from the record under Predictions, which counts the matches we cover. A dash means the season holds nothing to measure that figure from.

Frequently Asked Questions

How accurate are the AI predictions for Stefan Kozlov?

Our model has graded 43 matches involving Stefan Kozlov and got 26 right — a hit rate of 60.5%. The 21 most recent are listed below, each with the pick we made and how it finished.

Who has Stefan Kozlov played most often?

Of the matches we cover, Stefan Kozlov has met Alan Magadan most often — 3 times, with a 1-2 record.