Stefan Kozlov
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| Steve Johnson | 3 | 2 | 5 | Jul 14, 2022 | H2H |
| Sam Querrey | 0 | 2 | 2 | Aug 15, 2017 | H2H |
| Donald Young | 0 | 2 | 2 | Mar 11, 2017 | H2H |
| J.J. Wolf | 0 | 1 | 1 | Sep 22, 2022 | H2H |
| Daniil Medvedev | 0 | 1 | 1 | Aug 31, 2022 | H2H |
H2H data updated: 2026-09-02 00:00 UTC
Stefan Kozlov vs Thomaz Bellucci
Compare the head-to-head record, career totals, season-by-season performance, and match log for Stefan Kozlov vs Thomaz Bellucci.
Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.
H2H
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0 main draw meetings
H2H Match Log
| Player | Score | Player | Match Data | Date | Round | Tournament | Category | Surface |
|---|---|---|---|---|---|---|---|---|
| Stefan Kozlov | 6-7(3) 6-3 7-6(5) | Thomaz Bellucci | Match data | Apr 9, 2018 | Q1 | U.S. Men's Clay Court Championship | ATP 250 | Clay |
1 qualifying meeting shown in the table; qualifying is excluded from the H2H score. Arrows show an edition's recorded category and documented modern equivalent; unresolved editions keep their recorded category. Asterisked totals include editions mapped from documented historical predecessor categories. Mapping details.
Career Comparison
| Player | Current | Peak | Pts | Elo | W | L | Win % | GS | 1000 including documented historical predecessor categories | Finals | 500 including documented historical predecessor categories | 250 including documented historical predecessor categories | Titles |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Stefan Kozlov | #297 | #103 | 558 | 1,673 | 9 | 26 | 25.7% | 0 | 0 | 0 | 0 | 0 | 0 |
| Thomaz Bellucci | #1,303 | #21 | 1,732 | 1,932 | 182 | 204 | 47.2% | 0 | 0 | 0 | 0 | 4 | 4 |
Career Progression by Age
Seasons are aligned by the age each player spent most of that calendar year. GS and Titles are cumulative career totals through that season.
| Age | Stefan Kozlov | Thomaz Bellucci | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 15 | 2013 | 0–1 | 0.0% | #1083 | 1,489 | 0 | 0 | — | — | — | — | — | — | — |
| 16 | 2014 | 0–1 | 0.0% | #467 | 1,453 | 0 | 0 | — | — | — | — | — | — | — |
| 17 | 2015 | 0–2 | 0.0% | #351 | 1,420 | 0 | 0 | — | — | — | — | — | — | — |
| 18 | 2016 | 3–2 | 60.0% | #116 | 1,481 | 0 | 0 | — | — | — | — | — | — | — |
| 19 | 2017 | 2–9 | 18.2% | #167 | 1,549 | 0 | 0 | — | — | — | — | — | — | — |
| 20 | 2018 | 0–1 | 0.0% | #316 | 1,528 | 0 | 0 | 2008 | 3–12 | 20.0% | #85 | 1,540 | 0 | 0 |
| 21 | — | — | — | — | — | — | — | 2009 | 18–17 | 51.4% | #36 | 1,781 | 0 | 1 |
| 22 | 2020 | 0–1 | 0.0% | #371 | 1,514 | 0 | 0 | 2010 | 32–24 | 57.1% | #31 | 1,796 | 0 | 2 |
| 23 | 2021 | 0–1 | 0.0% | #159 | 1,550 | 0 | 0 | 2011 | 23–24 | 48.9% | #37 | 1,711 | 0 | 2 |
| 24 | 2022 | 4–8 | 33.3% | #198 | 1,529 | 0 | 0 | 2012 | 24–22 | 52.2% | #33 | 1,819 | 0 | 3 |
| 25 | — | — | — | — | — | — | — | 2013 | 7–16 | 30.4% | #125 | 1,678 | 0 | 3 |
| 26 | — | — | — | — | — | — | — | 2014 | 16–13 | 55.2% | #65 | 1,794 | 0 | 3 |
| 27 | — | — | — | — | — | — | — | 2015 | 29–27 | 51.8% | #37 | 1,854 | 0 | 4 |
| 28 | — | — | — | — | — | — | — | 2016 | 17–22 | 43.6% | #61 | 1,801 | 0 | 4 |
| 29 | — | — | — | — | — | — | — | 2017 | 12–20 | 37.5% | #113 | 1,701 | 0 | 4 |
| 30 | — | — | — | — | — | — | — | 2018 | 1–5 | 16.7% | #225 | 1,659 | 0 | 4 |
| 33 | — | — | — | — | — | — | — | 2021 | 0–1 | 0.0% | #449 | 1,614 | 0 | 4 |
| 35 | — | — | — | — | — | — | — | 2023 | 0–1 | 0.0% | #1303 | 1,603 | 0 | 4 |
Surface Results by Age
Seasons are aligned by the age each player spent most of that calendar year. Results cover completed main-draw matches. Bold green marks the higher win percentage when both players have at least 5 matches on that surface at the aligned age.
| Age | Stefan Kozlov | Thomaz Bellucci | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Hard | Clay | Grass | Yr | Hard | Clay | Grass | |||||||||||||||||||
| W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | W | L | M | Win % | |||
| 15 | 2013 | — | — | — | — | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 16 | 2014 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 17 | 2015 | 0 | 2 | 2 | 0.0% | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 18 | 2016 | — | — | — | — | — | — | — | — | 3 | 2 | 5 | 60.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 19 | 2017 | 0 | 6 | 6 | 0.0% | — | — | — | — | 2 | 3 | 5 | 40.0% | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 2018 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — | 2008 | 1 | 8 | 9 | 11.1% | 1 | 3 | 4 | 25.0% | 1 | 1 | 2 | 50.0% |
| 21 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2009 | 7 | 8 | 15 | 46.7% | 11 | 9 | 20 | 55.0% | — | — | — | — |
| 22 | 2020 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | 2010 | 11 | 13 | 24 | 45.8% | 19 | 10 | 29 | 65.5% | 2 | 1 | 3 | 66.7% |
| 23 | 2021 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — | 2011 | 7 | 13 | 20 | 35.0% | 14 | 9 | 23 | 60.9% | 2 | 2 | 4 | 50.0% |
| 24 | 2022 | 4 | 6 | 10 | 40.0% | — | — | — | — | 0 | 2 | 2 | 0.0% | 2012 | 10 | 11 | 21 | 47.6% | 14 | 9 | 23 | 60.9% | 0 | 2 | 2 | 0.0% |
| 25 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2013 | 3 | 7 | 10 | 30.0% | 4 | 9 | 13 | 30.8% | — | — | — | — |
| 26 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2014 | 6 | 5 | 11 | 54.5% | 10 | 8 | 18 | 55.6% | — | — | — | — |
| 27 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2015 | 9 | 14 | 23 | 39.1% | 20 | 11 | 31 | 64.5% | 0 | 2 | 2 | 0.0% |
| 28 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2016 | 9 | 9 | 18 | 50.0% | 7 | 11 | 18 | 38.9% | 1 | 2 | 3 | 33.3% |
| 29 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2017 | 1 | 5 | 6 | 16.7% | 11 | 13 | 24 | 45.8% | 0 | 2 | 2 | 0.0% |
| 30 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2018 | — | — | — | — | 1 | 5 | 6 | 16.7% | — | — | — | — |
| 33 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2021 | 0 | 1 | 1 | 0.0% | — | — | — | — | — | — | — | — |
| 35 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2023 | — | — | — | — | 0 | 1 | 1 | 0.0% | — | — | — | — |
| Career | — | 4 | 17 | 21 | 19.0% | 0 | 1 | 1 | 0.0% | 5 | 8 | 13 | 38.5% | — | 64 | 94 | 158 | 40.5% | 112 | 98 | 210 | 53.3% | 6 | 12 | 18 | 33.3% |
Performance Progression by Age
Seasons are aligned by the age each player spent most of that calendar year. Detailed serve and return statistics available for 35/35 of Stefan Kozlov's and 375/386 of Thomaz Bellucci's main draw matches. Sample is shown as matches with detailed serve and return statistics / total main draw matches. Bold green marks the stronger value when both stat samples contain at least 5 matches; lower is better for DFs/M.
| Age | Stefan Kozlov | Thomaz Bellucci | ||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Sample | Aces/M | DFs/M | 1st Sv% | 1st Pts% | 2nd Pts% | BP Saved% | BP Conv% | Svc Pts% | Ret Pts% | Yr | Sample | Aces/M | DFs/M | 1st Sv% | 1st Pts% | 2nd Pts% | BP Saved% | BP Conv% | Svc Pts% | Ret Pts% | |
| 15 | 2013 | 1/1 | 4.0 | 3.0 | 43.5% | 74.5% | 42.6% | 62.5% | 44.4% | 56.5% | 36.0% | — | —/— | — | — | — | — | — | — | — | — | — |
| 16 | 2014 | 1/1 | 2.0 | 4.0 | 56.4% | 61.3% | 50.0% | 63.6% | 16.7% | 56.4% | 35.5% | — | —/— | — | — | — | — | — | — | — | — | — |
| 17 | 2015 | 2/2 | 0.5 | 3.0 | 44.3% | 48.1% | 35.6% | 27.8% | 67.5% | 41.3% | 42.2% | — | —/— | — | — | — | — | — | — | — | — | — |
| 18 | 2016 | 5/5 | 4.2 | 4.8 | 55.8% | 67.8% | 41.9% | 67.2% | 40.4% | 56.9% | 38.4% | — | —/— | — | — | — | — | — | — | — | — | — |
| 19 | 2017 | 11/11 | 3.6 | 4.1 | 58.0% | 65.2% | 44.1% | 53.2% | 35.0% | 56.5% | 32.9% | — | —/— | — | — | — | — | — | — | — | — | — |
| 20 | 2018 | 1/1 | 2.0 | 5.0 | 50.9% | 65.5% | 35.7% | 20.0% | 50.0% | 50.9% | 28.0% | 2008 | 14/15 | 6.2 | 3.5 | 56.6% | 66.0% | 50.1% | 52.2% | 38.9% | 58.5% | 33.6% |
| 21 | — | —/— | — | — | — | — | — | — | — | — | — | 2009 | 35/35 | 6.7 | 2.6 | 61.2% | 71.4% | 51.4% | 58.0% | 37.9% | 63.5% | 34.5% |
| 22 | 2020 | 1/1 | 1.0 | 5.0 | 68.5% | 54.1% | 57.1% | 36.4% | 50.0% | 55.1% | 31.7% | 2010 | 55/56 | 7.2 | 2.8 | 58.2% | 71.4% | 50.2% | 56.7% | 43.0% | 62.5% | 37.8% |
| 23 | 2021 | 1/1 | 1.0 | 1.0 | 76.4% | 54.8% | 61.5% | 42.9% | 25.0% | 56.4% | 32.7% | 2011 | 47/47 | 6.3 | 2.7 | 61.1% | 71.6% | 49.9% | 57.9% | 40.4% | 63.2% | 37.7% |
| 24 | 2022 | 12/12 | 1.6 | 4.8 | 72.4% | 60.0% | 43.6% | 59.6% | 35.7% | 55.2% | 36.0% | 2012 | 44/46 | 5.8 | 2.8 | 56.5% | 70.7% | 52.6% | 57.2% | 41.6% | 62.7% | 38.2% |
| 25 | — | —/— | — | — | — | — | — | — | — | — | — | 2013 | 22/23 | 6.1 | 3.5 | 54.3% | 68.1% | 51.0% | 54.2% | 33.5% | 60.6% | 34.8% |
| 26 | — | —/— | — | — | — | — | — | — | — | — | — | 2014 | 28/29 | 6.8 | 3.3 | 56.3% | 73.0% | 51.8% | 60.0% | 47.9% | 63.8% | 36.6% |
| 27 | — | —/— | — | — | — | — | — | — | — | — | — | 2015 | 56/56 | 5.9 | 3.5 | 58.5% | 72.0% | 52.7% | 60.2% | 39.5% | 63.9% | 38.3% |
| 28 | — | —/— | — | — | — | — | — | — | — | — | — | 2016 | 34/39 | 4.8 | 4.1 | 56.8% | 68.9% | 51.4% | 53.6% | 43.7% | 61.3% | 38.2% |
| 29 | — | —/— | — | — | — | — | — | — | — | — | — | 2017 | 32/32 | 4.9 | 4.3 | 58.3% | 67.2% | 51.6% | 49.6% | 45.3% | 60.8% | 36.8% |
| 30 | — | —/— | — | — | — | — | — | — | — | — | — | 2018 | 6/6 | 4.2 | 3.3 | 59.0% | 68.8% | 49.0% | 57.0% | 45.5% | 60.7% | 40.2% |
| 33 | — | —/— | — | — | — | — | — | — | — | — | — | 2021 | 1/1 | 3.0 | 3.0 | 60.9% | 59.5% | 44.4% | 33.3% | 11.1% | 53.6% | 34.3% |
| 35 | — | —/— | — | — | — | — | — | — | — | — | — | 2023 | 1/1 | 0.0 | 3.0 | 53.5% | 55.3% | 51.5% | 62.5% | 0.0% | 53.5% | 25.0% |
| Career | — | 35/35 | 2.6 | 4.3 | 62.0% | 62.4% | 43.9% | 54.8% | 38.2% | 55.1% | 35.3% | — | 375/386 | 6.1 | 3.2 | 58.1% | 70.5% | 51.3% | 56.5% | 41.2% | 62.4% | 37.1% |
Advanced Statistics Comparison by Age
Seasons are aligned by the age each player spent most of that calendar year. Metrics are precomputed from eligible main-draw results; point-stat values use the available detailed sample. Bold green marks the stronger value when both underlying samples are sufficient. Lower is better for Schedule because a negative value means a tougher schedule. Career Schedule is normalized per 100 matches.
| Age | Stefan Kozlov | Thomaz Bellucci | ||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win % | Set Margin | Dec. Set | Tiebreak | Pressure+ | Schedule | Yr | Elo | P+ | Serve+ | Return+ | PD | TPW% | Hard Elo | Clay Elo | Grass Elo | Set Win % | Set Margin | Dec. Set | Tiebreak | Pressure+ | Schedule | |
| 15 | 2013 | 1490 | 100.2 | -4.35 | +1.56 | 0.828 | 46.1% | — | — | — | 33.3% | -1.33 | 0–1 | 1–0 | — | +0.13 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 16 | 2014 | 1454 | 100.0 | +0.67 | 0.00 | 0.813 | 45.3% | — | — | — | 0.0% | -3.00 | — | — | — | -0.04 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 17 | 2015 | 1420 | 101.3 | -5.76 | -0.97 | 0.718 | 41.8% | — | — | — | 0.0% | -3.50 | — | — | — | +0.21 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 18 | 2016 | 1481 | 107.5 | -3.43 | +1.33 | 0.891 | 48.1% | — | — | +119 | 54.5% | +0.09 | 1–0 | — | — | -0.03 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 19 | 2017 | 1550 | 118.7 | -5.47 | -0.25 | 0.757 | 44.9% | -74 | — | +123 | 21.7% | -1.70 | 2–1 (67%) | 0–3 (0%) | — | +0.21 | 2007 | 1485 | 98.0 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 20 | 2018 | 1528 | 106.2 | +0.19 | -0.20 | 0.570 | 40.2% | — | — | — | 0.0% | -3.50 | — | — | — | -0.08 | 2008 | 1541 | 122.5 | -1.95 | -2.46 | 0.810 | 46.6% | -85 | +113 | — | 34.1% | -1.14 | 0–5 (0%) | 4–1 (80%) | — | +0.12 |
| 21 | 2019 | 1514 | 100.9 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2009 | 1782 | 138.6 | +0.15 | -2.07 | 0.944 | 49.0% | -61 | -3 | — | 50.0% | -0.28 | 6–5 (55%) | 10–5 (67%) | — | +0.66 |
| 22 | 2020 | 1514 | 104.1 | -1.24 | +2.90 | 0.705 | 43.9% | — | — | — | 33.3% | -2.33 | 0–1 | 1–0 | — | -0.06 | 2010 | 1797 | 150.7 | -0.44 | +1.56 | 1.007 | 50.0% | -63 | +117 | -167 | 54.1% | +0.16 | 13–10 (57%) | 11–11 (50%) | — | +0.82 |
| 23 | 2021 | 1550 | 110.6 | +2.69 | +0.42 | 0.749 | 44.9% | — | — | — | 0.0% | -3.00 | — | — | — | +0.04 | 2011 | 1711 | 145.3 | +0.83 | +0.14 | 1.023 | 50.1% | -61 | +227 | -72 | 48.4% | -0.07 | 11–11 (50%) | 11–13 (46%) | — | +2.85 |
| 24 | 2022 | 1530 | 118.4 | -4.38 | +0.86 | 0.803 | 45.9% | +20 | — | — | 32.3% | -1.48 | 2–0 | 1–1 | — | -0.54 | 2012 | 1819 | 150.8 | +0.10 | +1.17 | 1.023 | 50.4% | -118 | +145 | — | 51.3% | +0.08 | 7–10 (41%) | 10–11 (48%) | — | -0.64 |
| 25 | 2023 | 1458 | 91.9 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2013 | 1679 | 127.7 | -1.87 | -1.99 | 0.883 | 47.7% | -32 | +132 | — | 36.2% | -0.97 | 5–7 (42%) | 6–5 (55%) | — | +0.53 |
| 26 | 2024 | 1433 | 92.7 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2014 | 1794 | 144.9 | +0.75 | -0.17 | 1.011 | 50.2% | -16 | +20 | — | 49.3% | +0.04 | 7–5 (58%) | 5–8 (38%) | — | -0.47 |
| 27 | 2025 | 1436 | 101.4 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2015 | 1855 | 155.7 | +0.52 | +2.08 | 1.061 | 50.9% | -84 | +107 | — | 50.4% | +0.01 | 11–10 (52%) | 16–13 (55%) | — | -0.93 |
| 28 | 2026 | 1418 | 97.5 | — | — | — | — | — | — | — | — | — | — | — | — | — | 2016 | 1801 | 145.0 | -1.11 | +1.56 | 0.986 | 49.7% | -29 | +10 | -201 | 44.1% | -0.39 | 5–8 (38%) | 7–6 (54%) | — | -0.79 |
| 29 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2017 | 1702 | 134.5 | -3.07 | +0.19 | 0.937 | 48.6% | -1 | +51 | — | 39.8% | -0.67 | 5–8 (38%) | 8–12 (40%) | — | -0.46 |
| 30 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2018 | 1660 | 117.8 | -0.83 | -0.48 | 1.024 | 50.4% | — | +58 | — | 38.9% | -0.83 | 0–4 (0%) | 1–1 | — | -0.14 |
| 31 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2019 | 1628 | 104.1 | — | — | — | — | — | — | — | — | — | — | — | — | — |
| 33 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2021 | 1614 | 102.4 | -1.27 | +1.41 | 0.740 | 44.1% | — | — | — | 0.0% | -2.50 | — | — | — | +0.03 |
| 35 | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | 2023 | 1603 | 103.9 | +1.78 | -2.27 | 0.538 | 41.5% | — | — | — | 0.0% | -3.50 | — | — | — | +0.03 |
| Career | — | 1674 | 113.0 | -4.10 | +0.48 | 0.784 | 45.4% | -15 | — | +121 | 28.4% | -1.58 | 5–3 (63%) | 3–4 (43%) | 104.8 | -0.46 | — | 1933 | 149.6 | -0.36 | +0.43 | 0.987 | 49.7% | -63 | +93 | -139 | 47.2% | -0.22 | 70–83 (46%) | 89–86 (51%) | 100.1 | +0.42 |
Career Rivalries
Each player's five most-played main-draw opponents. The current matchup is highlighted when it appears in a player's top five.
Thomaz Bellucci
all rivalries →| Opponent | W | L | M | Last Played | H2H |
|---|---|---|---|---|---|
| David Ferrer | 1 | 7 | 8 | Oct 8, 2015 | H2H |
| Federico Delbonis | 2 | 5 | 7 | May 29, 2018 | H2H |
| Philipp Kohlschreiber | 2 | 5 | 7 | Oct 22, 2016 | H2H |
| Pablo Cuevas | 3 | 3 | 6 | May 9, 2017 | H2H |
| Rafael Nadal | 0 | 6 | 6 | Aug 12, 2016 | H2H |