H2H data updated: 2026-09-03 00:00 UTC

Stefan Kozlov vs Yen-Hsun Lu

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

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Stefan Kozlov
United States Age 28 Right-Handed 183 cm / 6'0"
H2H
0 – 0
0 main draw meetings
Yen-Hsun Lu
TPE Age 43 Right-Handed 180 cm / 5'11"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Yen-Hsun Lu #82 6-4 6-3 Stefan Kozlov #356 Match data Aug 16, 2015 Q1 Q Cincinnati Open Masters 1000 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
Yen-Hsun Lu #991 #33 1,244 1,856 145 228 38.9% 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 Yen-Hsun Lu
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 2004 4–10 28.6% #87 1,455 0 0
21 — — — — — — — 2005 3–8 27.3% #158 1,529 0 0
22 2020 0–1 0.0% #371 1,514 0 0 2006 2–7 22.2% #89 1,489 0 0
23 2021 0–1 0.0% #159 1,550 0 0 2007 6–14 30.0% #110 1,500 0 0
24 2022 4–8 33.3% #198 1,529 0 0 2008 9–14 39.1% #64 1,601 0 0
25 — — — — — — — 2009 9–22 29.0% #98 1,587 0 0
26 — — — — — — — 2010 15–20 42.9% #35 1,708 0 0
27 — — — — — — — 2011 11–20 35.5% #82 1,709 0 0
28 — — — — — — — 2012 12–18 40.0% #59 1,737 0 0
29 — — — — — — — 2013 17–18 48.6% #65 1,765 0 0
30 — — — — — — — 2014 24–23 51.1% #38 1,795 0 0
31 — — — — — — — 2015 16–22 42.1% #77 1,828 0 0
32 — — — — — — — 2016 7–9 43.8% #64 1,801 0 0
33 — — — — — — — 2017 9–14 39.1% #71 1,703 0 0
36 — — — — — — — 2020 0–2 0.0% #1008 1,673 0 0
37 — — — — — — — 2021 1–7 12.5% #568 1,612 0 0

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 Yen-Hsun Lu
Yr HardClayGrassCarpet Yr HardClayGrassCarpet
W L M Win % W L M Win % 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% — — — — — — — — 2004 1 7 8 12.5% — — — — 3 3 6 50.0% — — — —
21 — — — — — — — — — — — — — — — — — 2005 1 6 7 14.3% — — — — 1 1 2 50.0% 1 1 2 50.0%
22 2020 0 1 1 0.0% — — — — — — — — — — — — 2006 1 5 6 16.7% — — — — 1 2 3 33.3% — — — —
23 2021 0 1 1 0.0% — — — — — — — — — — — — 2007 6 11 17 35.3% 0 1 1 0.0% 0 2 2 0.0% — — — —
24 2022 4 6 10 40.0% — — — — 0 2 2 0.0% — — — — 2008 9 11 20 45.0% — — — — 0 3 3 0.0% — — — —
25 — — — — — — — — — — — — — — — — — 2009 8 16 24 33.3% 0 3 3 0.0% 1 3 4 25.0% — — — —
26 — — — — — — — — — — — — — — — — — 2010 10 16 26 38.5% 0 1 1 0.0% 5 3 8 62.5% — — — —
27 — — — — — — — — — — — — — — — — — 2011 7 14 21 33.3% 1 3 4 25.0% 3 3 6 50.0% — — — —
28 — — — — — — — — — — — — — — — — — 2012 8 12 20 40.0% 0 2 2 0.0% 4 4 8 50.0% — — — —
29 — — — — — — — — — — — — — — — — — 2013 13 14 27 48.1% 2 2 4 50.0% 2 2 4 50.0% — — — —
30 — — — — — — — — — — — — — — — — — 2014 20 17 37 54.1% 1 3 4 25.0% 3 3 6 50.0% — — — —
31 — — — — — — — — — — — — — — — — — 2015 12 16 28 42.9% 1 2 3 33.3% 3 4 7 42.9% — — — —
32 — — — — — — — — — — — — — — — — — 2016 6 7 13 46.2% 0 1 1 0.0% 1 1 2 50.0% — — — —
33 — — — — — — — — — — — — — — — — — 2017 9 12 21 42.9% 0 1 1 0.0% 0 1 1 0.0% — — — —
36 — — — — — — — — — — — — — — — — — 2020 0 2 2 0.0% — — — — — — — — — — — —
37 — — — — — — — — — — — — — — — — — 2021 1 4 5 20.0% 0 1 1 0.0% 0 2 2 0.0% — — — —
Career — 4 17 21 19.0% 0 1 1 0.0% 5 8 13 38.5% — — — — — 112 170 282 39.7% 5 20 25 20.0% 27 37 64 42.2% 1 1 2 50.0%

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 360/373 of Yen-Hsun Lu'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 Yen-Hsun Lu
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% 2004 13/14 4.2 3.8 60.4% 70.4% 50.3% 56.7% 29.5% 62.4% 32.7%
21 — —/— — — — — — — — — — 2005 10/11 5.6 4.3 58.4% 72.2% 46.4% 47.1% 48.4% 61.6% 35.8%
22 2020 1/1 1.0 5.0 68.5% 54.1% 57.1% 36.4% 50.0% 55.1% 31.7% 2006 8/9 3.9 2.9 61.6% 71.6% 51.5% 45.1% 56.4% 63.7% 33.7%
23 2021 1/1 1.0 1.0 76.4% 54.8% 61.5% 42.9% 25.0% 56.4% 32.7% 2007 20/20 4.0 4.1 59.5% 67.6% 46.0% 56.1% 33.4% 58.9% 34.4%
24 2022 12/12 1.6 4.8 72.4% 60.0% 43.6% 59.6% 35.7% 55.2% 36.0% 2008 20/23 4.3 4.8 60.2% 69.2% 49.2% 59.3% 33.6% 61.2% 34.2%
25 — —/— — — — — — — — — — 2009 31/31 3.2 3.5 61.3% 67.3% 46.3% 53.9% 39.1% 59.1% 35.1%
26 — —/— — — — — — — — — — 2010 35/35 5.3 3.1 59.4% 70.3% 51.7% 57.9% 36.2% 62.7% 35.3%
27 — —/— — — — — — — — — — 2011 31/31 3.2 3.7 60.9% 67.9% 49.4% 57.6% 43.8% 60.5% 33.7%
28 — —/— — — — — — — — — — 2012 29/30 4.5 3.8 60.4% 69.7% 50.4% 55.5% 40.3% 62.1% 34.3%
29 — —/— — — — — — — — — — 2013 34/35 3.9 3.2 62.7% 70.1% 54.1% 54.1% 43.0% 64.0% 39.9%
30 — —/— — — — — — — — — — 2014 45/47 3.8 3.0 64.1% 71.7% 52.7% 64.1% 40.4% 64.8% 35.3%
31 — —/— — — — — — — — — — 2015 37/38 4.8 2.4 57.8% 70.8% 51.5% 52.9% 40.1% 62.8% 36.3%
32 — —/— — — — — — — — — — 2016 15/16 6.3 3.5 59.8% 71.6% 52.3% 54.3% 38.4% 63.8% 34.1%
33 — —/— — — — — — — — — — 2017 23/23 5.2 3.9 58.5% 73.0% 53.6% 54.8% 41.6% 65.1% 37.9%
36 — —/— — — — — — — — — — 2020 2/2 3.0 3.5 54.9% 62.8% 44.4% 54.5% 12.5% 54.6% 32.4%
37 — —/— — — — — — — — — — 2021 7/8 2.1 3.0 65.1% 60.2% 45.7% 43.7% 53.6% 55.2% 29.8%
Career — 35/35 2.6 4.3 62.0% 62.4% 43.9% 54.8% 38.2% 55.1% 35.3% — 360/373 4.3 3.4 60.7% 69.9% 50.6% 56.0% 39.9% 62.2% 35.4%

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 Yen-Hsun Lu
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 2002 1485 100.1 — — — — — — — — — — — — —
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 2003 1442 100.8 — — — — — — — — — — — — —
20 2018 1528 106.2 +0.19 -0.20 0.570 40.2% — — — 0.0% -3.50 — — — -0.08 2004 1456 111.8 -0.90 -1.80 0.870 47.4% -24 — +127 32.4% -1.03 0–2 1–2 (33%) — -0.23
21 2019 1514 100.9 — — — — — — — — — — — — — 2005 1529 105.2 -1.75 -1.63 0.935 48.5% -92 — — 37.9% -0.52 1–3 (25%) 2–2 (50%) — +0.76
22 2020 1514 104.1 -1.24 +2.90 0.705 43.9% — — — 33.3% -2.33 0–1 1–0 — -0.06 2006 1490 101.0 -1.09 -2.45 0.929 48.0% -60 — +138 23.8% -1.57 0–1 1–4 (20%) — +0.44
23 2021 1550 110.6 +2.69 +0.42 0.749 44.9% — — — 0.0% -3.00 — — — +0.04 2007 1501 120.4 -3.97 -1.15 0.837 46.6% -1 — — 31.8% -1.04 2–3 (40%) 3–5 (38%) — +0.38
24 2022 1530 118.4 -4.38 +0.86 0.803 45.9% +20 — — 32.3% -1.48 2–0 1–1 — -0.54 2008 1601 125.7 -1.79 -1.16 0.883 47.9% +17 — -89 47.4% -0.54 2–5 (29%) 10–2 (83%) — +0.73
25 2023 1458 91.9 — — — — — — — — — — — — — 2009 1587 133.7 -2.87 -1.18 0.858 47.1% +17 -132 -72 36.8% -0.97 4–8 (33%) 6–3 (67%) — -0.68
26 2024 1433 92.7 — — — — — — — — — — — — — 2010 1708 134.3 -0.60 -0.59 0.948 48.8% -66 — 0 44.0% -0.57 4–4 (50%) 9–6 (60%) — +1.46
27 2025 1436 101.4 — — — — — — — — — — — — — 2011 1710 133.3 -2.05 -2.16 0.853 47.4% -62 -270 +28 41.1% -0.77 1–5 (17%) 7–5 (58%) — -1.26
28 2026 1418 97.5 — — — — — — — — — — — — — 2012 1738 140.5 -0.67 -1.75 0.905 48.3% +2 — -20 42.5% -0.41 5–4 (56%) 8–8 (50%) — -0.01
29 — — — — — — — — — — — — — — — — 2013 1765 147.8 +0.73 +1.97 1.108 51.5% -3 -266 -12 51.2% +0.26 3–8 (27%) 6–8 (43%) — +0.45
30 — — — — — — — — — — — — — — — — 2014 1795 150.6 +0.13 +0.10 1.003 50.0% +19 -310 -17 52.4% +0.03 6–5 (55%) 11–9 (55%) — +1.57
31 — — — — — — — — — — — — — — — — 2015 1828 152.3 -0.89 +0.91 0.976 49.4% +7 -314 -2 47.7% -0.12 3–6 (33%) 7–6 (54%) — -1.54
32 — — — — — — — — — — — — — — — — 2016 1801 147.0 +1.01 -0.51 0.941 49.3% -24 — — 47.5% -0.33 0–3 (0%) 3–3 (50%) — -1.76
33 — — — — — — — — — — — — — — — — 2017 1703 133.4 +0.54 +0.75 1.087 51.1% -1 — — 43.5% +0.03 2–5 (29%) 3–8 (27%) — +1.49
36 — — — — — — — — — — — — — — — — 2020 1674 106.0 -0.99 -1.90 0.714 43.3% — — — 16.7% -2.84 0–1 — — +0.06
37 — — — — — — — — — — — — — — — — 2021 1612 125.4 -3.24 -0.96 0.665 43.1% +37 — — 15.0% -2.25 — 0–2 — -0.47
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 — 1856 144.1 -0.96 -0.49 0.937 48.7% -10 -262 +8 42.8% -0.48 33–63 (34%) 77–73 (51%) 97.0 +0.38

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.