USA World No. 290 Stefan Kozlov is 23–24 in 2026.
Stefan Kozlov’s last match was on 1 Oct at Columbus, a loss to Mitchell Krueger.
As of 8 October 2026, 16:46 UTC.
Next match
Opponent, time and what people predict.
No match scheduled right now. Last played 1 Oct at Columbus: lost to Mitchell Krueger 2–6 6–3 3–6.
World ranking
No. 290
Up 4 places since 28 Sept
2026 season
23–24
Last 5 matches
L L L W L
Career titles
0
23–24
2026 record
47 matches through 1 Oct.
- Hard
- 12–17
- Clay
- 8–6
- Grass
- 3–1
3
Match winning streak
At Oeiras, 18 Jan to 20 Jan.
- Deciding sets
- 10–11
- Tiebreaks
- 5–8
Tournament Run
Stefan Kozlov is not in a draw this week - the bracket appears once a tournament starts.
News & Insights
What is happening around Stefan Kozlov - headlines from our approved sources, links go to the source.
No fresh headlines about Stefan Kozlov from our sources yet.
Serve & return, 2026
How the points are won, from the match statistics api-tennis records. The tick on each bar is the median of the ATP top 100.
31 matches with statistics
On serve 11 points worse than the ATP median at holding serve
- Aces per match
- 2.7 tour median 6.1 · fewer than most
- Double faults per match
- 4.0 tour median 2.6 · more than most
- 1st serve points won
- 67% tour median 73%
- 2nd serve points won
- 47% tour median 52%
- Service games held
- 71% tour median 82%
- Break points saved
- 56% tour median 63%
On return about tour average at converting break points
- Return games won
- 27% tour median 22%
- Break points converted
- 40% tour median 40%
Career
0 singles titles · best year-end No. 116 (2016). Year-end singles ranking by season, from api-tennis.
Results
Every singles result on record, newest first. Opponents link to their page and the score to the match page, where we have one; "people predicted" is this player's Polymarket price before the match.
| Date | Result | Opponent | Tournament | Score | People predicted |
|---|---|---|---|---|---|
| 1 Oct 2026 | L | Mitchell Krueger | Columbus · Round of 16 | 2–6 6–3 3–6 | |
| 29 Sept 2026 | W |  James Kent Trotter | Columbus · Round of 32 | 6–3 6–2 | |
| 22 Sept 2026 | L |  Colton Smith | San Diego 2 (Usa) · Round of 32 | 4–6 2–6 | |
| 15 Sept 2026 | L | Darwin Blanch | Tiburon · Round of 32 | 3–6 6–2 6–7(10) | |
| 13 Aug 2026 | L |  Harry Wendelken | Brownsburg (Usa) · Round of 16 | 6–2 4–6 1–6 | |
| 12 Aug 2026 | W |  Aidan Mayo | Brownsburg (Usa) · Round of 32 | 6–3 5–7 6–2 | |
| 25 Jul 2026 | L |  Zachary Svajda | Washington · Qualifying semi-finals | 5–7 1–6 | |
| 21 Jul 2026 | L |  Alan Magadan | Bloomfield Hills · Round of 32 | 6–3 1–6 6–7(4) |
Show next 20 of 39 more
| 20 Jul 2026 | L |  Roger Pascual Ferra | Bloomfield Hills · Qualifying final | 4–6 4–6 | |
| 19 Jul 2026 | W | Leo Vithoontien | Bloomfield Hills · Qualifying semi-finals | 4–6 6–1 6–2 | |
| 14 Jul 2026 | L |  Yi Zhou | Pozoblanco · Round of 32 | 3–6 6–3 4–6 | |
| 10 Jul 2026 | L |  Jacob Fearnley | Newport · Round of 16 | 6–3 3–6 2–6 | |
| 9 Jul 2026 | W |  Yibing Wu | Newport · Round of 32 | 6–4 2–6 6–4 | |
| 7 Jul 2026 | W |  Garrett Johns | Newport · Qualifying final | 6–4 6–2 | |
| 5 Jul 2026 | W | Aidan Mayo | Newport · Qualifying semi-finals | 7–6(3) 5–7 6–3 | |
| 12 May 2026 | L |  Alejo Sanchez Quilez | Valencia · Qualifying final | 5–7 4–6 | |
| 11 May 2026 | W | Mario Mansilla Diez | Valencia · Qualifying semi-finals | 6–2 6–1 | |
| 22 Apr 2026 | L |  Nick Hardt | Savannah · Round of 16 | 2–6 6–2 0–6 | |
| 20 Apr 2026 | W |  Daniil Glinka | Savannah · Round of 32 | 6–2 6–3 | |
| 14 Apr 2026 | L |  Alex Rybakov | Tallahassee · Round of 32 | 6–7(3) 2–6 | |
| 13 Apr 2026 | W |  Kilian Feldbausch | Tallahassee · Qualifying final | 6–1 4–6 7–6(2) | |
| 12 Apr 2026 | W | Strong Kirchheimer | Tallahassee · Qualifying semi-finals | 6–0 6–4 | |
| 8 Apr 2026 | L |  James Duckworth | Mexico City · Round of 16 | 3–6 2–6 | |
| 6 Apr 2026 | W |  Raphael Perot | Mexico City · Round of 32 | 6–3 6–1 | |
| 31 Mar 2026 | L | Alan Magadan | San Luis Potosi · Round of 32 | 3–6 6–7(7) | |
| 24 Mar 2026 | L | Andres Martin | Morelia · Round of 32 | 2–6 2–6 | |
| 19 Mar 2026 | L |  Michael Mmoh | Morelos · Round of 16 | 5–7 2–6 | |
| 17 Mar 2026 | W | Alan Magadan | Morelos · Round of 32 | 6–4 6–4 |
Show next 19 of 19 more
| 11 Mar 2026 | L | Dylan Hara Friend Jay | Phoenix · Round of 32 | 2–6 6–4 3–6 | |
| 10 Mar 2026 | W | Marc Polmans | Phoenix · Qualifying final | 6–1 3–6 6–4 | |
| 9 Mar 2026 | W | Nathan Ponwith | Phoenix · Qualifying semi-finals | 7–5 6–4 | |
| 22 Feb 2026 | L | Patrick Kypson | Acapulco · Qualifying semi-finals | 6–7(3) 0–6 | |
| 20 Feb 2026 | L | Rodrigo Pacheco Mendez | Metepec · Quarter-finals | 4–6 2–6 | |
| 18 Feb 2026 | W |  Karl Poling | Metepec · Round of 16 | 6–4 7–6(4) | |
| 16 Feb 2026 | W |  Tristan McCormick | Metepec · Round of 32 | 6–3 6–7(4) 6–4 | |
| 6 Feb 2026 | L |  Keegan Smith | Cleveland · Quarter-finals | 3–6 2–6 | |
| 4 Feb 2026 | W | Raphael Perot | Cleveland · Round of 16 | 7–6(5) 3–6 6–3 | |
| 2 Feb 2026 | W | Cedrik-Marcel Stebe | Cleveland · Round of 32 | 3–6 6–2 6–3 | |
| 28 Jan 2026 | L |  Sho Shimabukuro | San Diego · Round of 32 | 2–6 6–4 6–7(5) | |
| 22 Jan 2026 | L |  Francesco Passaro | Oeiras · Round of 16 | 3–6 6–1 1–6 | |
| 20 Jan 2026 | W |  Alexis Galarneau | Oeiras · Round of 32 | 7–6(2) 2–6 6–1 | |
| 19 Jan 2026 | W | Mikhail Kukushkin | Oeiras · Qualifying final | 6–4 6–2 | |
| 18 Jan 2026 | W |  Robert Strombachs | Oeiras · Qualifying semi-finals | 6–3 5–0 ret. | |
| 13 Jan 2026 | L | Harry Wendelken | Glasgow · Round of 32 | 1–6 6–3 4–6 | |
| 8 Jan 2026 | L |  Toby Samuel | Nottingham 3 · Quarter-finals | 6–7(1) 4–6 | |
| 7 Jan 2026 | W |  Mathys Erhard | Nottingham 3 · Round of 16 | 6–2 6–4 | |
| 6 Jan 2026 | W |  Tyler Zink | Nottingham 3 · Round of 32 | 6–4 6–1 |