H2H data updated: 2026-09-02 00:00 UTC

Stefan Kozlov vs Sam Groth

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

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Stefan Kozlov
United States Age 28 Right-Handed 183 cm / 6'0"
H2H
0 – 0
0 main draw meetings
Sam Groth
AUS Age 38 Right-Handed 193 cm / 6'4"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Sam Groth #96 3-6 7-6(5) 6-4 Stefan Kozlov #857 Match data Jul 28, 2014 Q1 Q Washington Open ATP 500 Hard
Sam Groth #176 6-3 6-4 Stefan Kozlov #1082 Match data Mar 6, 2014 Q1 Q Indian Wells Open Masters 1000 Hard

2 qualifying meetings 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
Sam Groth #1,155 #53 843 1,849 36 58 38.3% 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 Sam Groth
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 2008 1–1 50.0% #278 1,556 0 0
21 — — — — — — — 2009 1–2 33.3% #279 1,548 0 0
22 2020 0–1 0.0% #371 1,514 0 0 — — — — — — —
23 2021 0–1 0.0% #159 1,550 0 0 — — — — — — —
24 2022 4–8 33.3% #198 1,529 0 0 — — — — — — —
25 — — — — — — — 2013 1–3 25.0% #172 1,553 0 0
26 — — — — — — — 2014 9–13 40.9% #81 1,707 0 0
27 — — — — — — — 2015 18–21 46.2% #60 1,796 0 0
28 — — — — — — — 2016 4–15 21.1% #180 1,636 0 0
29 — — — — — — — 2017 2–3 40.0% #248 1,594 0 0

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 93/94 of Sam Groth'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 Sam Groth
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 2/2 19.0 6.0 54.6% 87.5% 56.2% 78.6% 37.5% 72.7% 33.2%
21 — —/— — — — — — — — — — 2009 3/3 10.3 8.3 49.4% 71.0% 48.2% 60.8% 100.0% 59.3% 28.8%
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% — —/— — — — — — — — — —
24 2022 12/12 1.6 4.8 72.4% 60.0% 43.6% 59.6% 35.7% 55.2% 36.0% — —/— — — — — — — — — —
25 — —/— — — — — — — — — — 2013 4/4 15.5 5.0 64.1% 72.9% 54.7% 64.2% 24.1% 65.9% 32.3%
26 — —/— — — — — — — — — — 2014 22/22 15.6 4.2 61.8% 81.6% 54.3% 67.8% 30.8% 71.1% 28.8%
27 — —/— — — — — — — — — — 2015 39/39 16.0 4.6 61.6% 78.8% 51.4% 66.5% 26.3% 68.1% 28.5%
28 — —/— — — — — — — — — — 2016 18/19 14.8 5.8 58.0% 77.3% 46.6% 63.5% 44.8% 64.2% 29.4%
29 — —/— — — — — — — — — — 2017 5/5 15.8 6.4 56.3% 79.2% 48.1% 67.4% 39.9% 65.9% 26.2%
Career — 35/35 2.6 4.3 62.0% 62.4% 43.9% 54.8% 38.2% 55.1% 35.3% — 93/94 15.5 5.0 60.2% 78.9% 51.1% 66.3% 34.2% 67.6% 28.9%

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 Sam Groth
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 2008 1557 104.1 +1.47 -1.35 1.219 53.0% — — — 60.0% +0.20 0–1 2–0 — +0.15
21 2019 1514 100.9 — — — — — — — — — — — — — 2009 1548 110.5 -1.72 -0.48 0.708 45.0% — — — 33.3% -1.44 1–0 1–0 — +0.28
22 2020 1514 104.1 -1.24 +2.90 0.705 43.9% — — — 33.3% -2.33 0–1 1–0 — -0.06 2010 1527 100.7 — — — — — — — — — — — — —
23 2021 1550 110.6 +2.69 +0.42 0.749 44.9% — — — 0.0% -3.00 — — — +0.04 2011 1493 100.0 — — — — — — — — — — — — —
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 1479 100.4 — — — — — — — — — — — — —
25 2023 1458 91.9 — — — — — — — — — — — — — 2013 1553 113.3 -1.09 +0.67 0.946 49.0% -20 — — 40.0% -0.60 0–2 2–0 — -0.22
26 2024 1433 92.7 — — — — — — — — — — — — — 2014 1708 131.6 +4.20 -3.96 0.998 49.9% -73 — +91 41.8% -0.15 3–4 (43%) 11–13 (46%) — +0.17
27 2025 1436 101.4 — — — — — — — — — — — — — 2015 1797 142.6 +2.73 -5.23 0.895 48.7% -77 -215 +92 46.9% -0.37 6–8 (43%) 18–13 (58%) — -0.77
28 2026 1418 97.5 — — — — — — — — — — — — — 2016 1636 125.3 +0.82 -4.85 0.819 47.1% -67 — +169 24.4% -1.29 0–2 2–11 (15%) — -1.24
29 — — — — — — — — — — — — — — — — 2017 1594 116.2 -0.83 -1.85 0.767 47.3% -41 — — 35.7% -0.86 2–0 1–2 (33%) — -0.26
30 — — — — — — — — — — — — — — — — 2018 1572 104.4 — — — — — — — — — — — — —
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 — 1849 129.9 +2.18 -4.18 0.894 48.6% -69 -215 +113 40.3% -0.56 12–17 (41%) 37–39 (49%) 98.2 -2.01

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.