H2H data updated: 2026-09-01 00:00 UTC

Stefan Kozlov vs Michael Berrer

Compare the head-to-head record, career totals, season-by-season performance, and match log for Stefan Kozlov vs Michael Berrer.

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Stefan Kozlov
United States Age 28 Right-Handed 183 cm / 6'0"
H2H
0 – 0
0 main draw meetings
Michael Berrer
GER Age 46 Left-Handed 193 cm / 6'4"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Michael Berrer #145 2-6 7-6(5) 6-2 Stefan Kozlov #154 Match data Aug 29, 2016 Q1 Q US Open Grand Slam Hard

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
Michael Berrer #952 #42 960 1,783 88 143 38.1% 0 0 0 0 0 0

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 Michael Berrer
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
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 — — — — — — —
22 2020 0–1 0.0% #371 1,514 0 0 — — — — — — —
23 2021 0–1 0.0% #159 1,550 0 0 2004 0–1 0.0% #235 1,498 0 0
24 2022 4–8 33.3% #198 1,529 0 0 2005 1–2 33.3% #126 1,526 0 0
25 — — — — — — — 2006 4–11 26.7% #152 1,513 0 0
26 — — — — — — — 2007 13–12 52.0% #57 1,672 0 0
27 — — — — — — — 2008 8–20 28.6% #131 1,544 0 0
28 — — — — — — — 2009 5–8 38.5% #74 1,628 0 0
29 — — — — — — — 2010 20–28 41.7% #58 1,682 0 0
30 — — — — — — — 2011 17–22 43.6% #100 1,701 0 0
31 — — — — — — — 2012 5–11 31.2% #138 1,702 0 0
32 — — — — — — — 2013 2–3 40.0% #143 1,619 0 0
33 — — — — — — — 2014 3–6 33.3% #128 1,577 0 0
34 — — — — — — — 2015 6–10 37.5% #115 1,682 0 0
35 — — — — — — — 2016 4–9 30.8% #182 1,630 0 0

Performance Progression by Age

Seasons are aligned by the age each player spent most of that calendar year. 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 Michael Berrer
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% — —/— — — — — — — — — —
22 2020 1/1 1.0 5.0 68.5% 54.1% 57.1% 36.4% 50.0% 55.1% 31.7% — —/— — — — — — — — — —
23 2021 1/1 1.0 1.0 76.4% 54.8% 61.5% 42.9% 25.0% 56.4% 32.7% 2004 1/1 6.0 6.0 67.3% 75.0% 59.5% 83.3% 12.5% 69.9% 30.4%
24 2022 12/12 1.6 4.8 72.4% 60.0% 43.6% 59.6% 35.7% 55.2% 36.0% 2005 3/3 5.3 2.7 62.5% 75.1% 47.4% 38.3% 20.0% 64.3% 28.4%
25 — —/— — — — — — — — — — 2006 15/15 7.3 4.9 60.7% 72.0% 50.6% 46.5% 44.5% 63.8% 34.0%
26 — —/— — — — — — — — — — 2007 25/25 6.6 3.1 62.8% 75.3% 53.0% 64.8% 47.8% 66.9% 34.7%
27 — —/— — — — — — — — — — 2008 28/28 5.0 4.2 62.2% 71.3% 48.5% 63.0% 33.3% 62.6% 32.6%
28 — —/— — — — — — — — — — 2009 13/13 5.3 4.8 66.1% 67.2% 44.5% 56.2% 38.1% 59.1% 38.0%
29 — —/— — — — — — — — — — 2010 48/48 5.2 2.9 63.8% 71.8% 48.4% 58.2% 48.4% 63.2% 33.7%
30 — —/— — — — — — — — — — 2011 39/39 5.0 2.9 64.1% 70.2% 48.9% 61.9% 36.7% 62.7% 35.2%
31 — —/— — — — — — — — — — 2012 16/16 5.7 2.1 67.9% 65.9% 48.6% 55.4% 30.5% 60.4% 34.2%
32 — —/— — — — — — — — — — 2013 5/5 4.0 3.6 65.1% 66.6% 41.8% 67.3% 38.3% 57.7% 41.6%
33 — —/— — — — — — — — — — 2014 9/9 5.2 2.2 65.3% 69.7% 50.5% 67.3% 56.4% 63.2% 31.3%
34 — —/— — — — — — — — — — 2015 16/16 9.1 5.3 61.6% 73.3% 47.8% 60.3% 38.4% 63.3% 29.9%
35 — —/— — — — — — — — — — 2016 13/13 5.0 2.0 68.5% 68.0% 45.1% 55.1% 40.0% 60.9% 33.9%
Career — 35/35 2.6 4.3 62.0% 62.4% 43.9% 54.8% 38.2% 55.1% 35.3% — 231/231 5.7 3.4 64.0% 70.9% 48.7% 59.4% 40.9% 62.9% 33.9%

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 Michael Berrer
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 — — — — — — — — — — — — — — — —
20 2018 1528 106.2 +0.19 -0.20 0.570 40.2% — — — 0.0% -3.50 — — — -0.08 — — — — — — — — — — — — — — — —
21 2019 1514 100.9 — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
22 2020 1514 104.1 -1.24 +2.90 0.705 43.9% — — — 33.3% -2.33 0–1 1–0 — -0.06 — — — — — — — — — — — — — — — —
23 2021 1550 110.6 +2.69 +0.42 0.749 44.9% — — — 0.0% -3.00 — — — +0.04 2004 1499 100.3 -2.11 -0.14 1.009 50.2% — — — 33.3% 0.00 0–1 0–1 — +0.08
24 2022 1530 118.4 -4.38 +0.86 0.803 45.9% +20 — — 32.3% -1.48 2–0 1–1 — -0.54 2005 1526 108.7 +0.14 -0.27 0.796 46.0% — — — 33.3% -1.50 — — — -0.19
25 2023 1458 91.9 — — — — — — — — — — — — — 2006 1513 118.6 +1.11 -2.59 0.940 48.7% +37 -67 — 41.9% -0.51 1–8 (11%) 2–7 (22%) — +0.15
26 2024 1433 92.7 — — — — — — — — — — — — — 2007 1673 130.6 +2.81 -0.76 1.048 50.8% -7 — -37 50.8% +0.06 3–4 (43%) 5–6 (45%) — +0.13
27 2025 1436 101.4 — — — — — — — — — — — — — 2008 1545 124.1 -0.69 -3.10 0.871 48.0% +23 -66 +67 32.8% -1.06 0–5 (0%) 6–6 (50%) — +1.27
28 2026 1418 97.5 — — — — — — — — — — — — — 2009 1628 128.4 -2.08 +1.27 0.929 48.6% +32 — — 45.7% -0.66 1–3 (25%) 4–4 (50%) — +0.28
29 — — — — — — — — — — — — — — — — 2010 1683 144.9 +0.52 -2.26 0.916 48.7% +31 -202 — 43.4% -0.38 7–9 (44%) 11–13 (46%) — -0.18
30 — — — — — — — — — — — — — — — — 2011 1702 133.8 +0.20 -1.21 0.942 48.8% 0 -117 -153 40.9% -0.48 7–2 (78%) 5–7 (42%) — -0.63
31 — — — — — — — — — — — — — — — — 2012 1703 132.9 -1.36 -1.40 0.863 47.4% +51 -96 — 36.6% -0.80 2–6 (25%) 2–6 (25%) — -0.05
32 — — — — — — — — — — — — — — — — 2013 1619 114.2 -1.90 +0.16 0.984 49.4% — +9 — 55.6% +0.89 2–1 (67%) 0–1 — +0.28
33 — — — — — — — — — — — — — — — — 2014 1577 118.3 -1.12 -1.64 0.851 47.7% +99 — — 37.5% -0.50 2–2 (50%) 0–4 (0%) — +0.38
34 — — — — — — — — — — — — — — — — 2015 1683 127.9 -0.17 -3.86 0.815 47.5% +39 — — 39.0% -0.93 4–4 (50%) 5–3 (63%) — +0.50
35 — — — — — — — — — — — — — — — — 2016 1630 116.0 -1.84 -2.40 0.866 47.8% +71 -116 — 37.5% -0.88 2–4 (33%) 3–3 (50%) — 0.00
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 — 1784 132.8 +0.02 -1.79 0.914 48.6% +28 -108 -60 41.2% -0.55 31–49 (39%) 43–61 (41%) 94.0 +0.87

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.