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

Yoshihito Nishioka vs Stefan Kozlov H2H: 0-1

Stefan Kozlov holds a 1–0 lead over Yoshihito Nishioka in their ATP head-to-head. Across 1 main-draw meeting, Stefan Kozlov leads 1–0 on grass. Most recently, Stefan Kozlov won the 2016 Libéma Open first round 6-1 2-6 6-3.

Want to explore more matchups? Advanced rivalry search lets you browse current and historical rivalries, unbeaten records, or every matchup for a player.

Yoshihito Nishioka
Japan Age 30 Left-Handed 170 cm / 5'7"
H2H
0 – 1
1 main-draw meetings
Stefan Kozlov
United States Age 28 Right-Handed 183 cm / 6'0"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Stefan Kozlov #196 6-1 2-6 6-3 Yoshihito Nishioka #117 Match data Jun 9, 2016* R32 Libéma Open ATP 250 Grass

Estimated match date where the exact historical date is unavailable. 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
Yoshihito Nishioka #202 #24 1,351 1,929 131 161 44.9% 0 0 0 0 3 3
Stefan Kozlov #297 #103 558 1,673 9 26 25.7% 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 Yoshihito Nishioka Stefan Kozlov
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 2014 0–1 0.0% #166 1,542 0 0 2016 3–2 60.0% #116 1,481 0 0
19 2015 3–5 37.5% #117 1,643 0 0 2017 2–9 18.2% #167 1,549 0 0
20 2016 8–12 40.0% #100 1,716 0 0 2018 0–1 0.0% #316 1,528 0 0
21 2017 9–7 56.2% #166 1,833 0 0 — — — — — — —
22 2018 9–11 45.0% #75 1,852 0 1 2020 0–1 0.0% #371 1,514 0 0
23 2019 17–19 47.2% #73 1,843 0 1 2021 0–1 0.0% #159 1,550 0 0
24 2020 12–11 52.2% #56 1,815 0 1 2022 4–8 33.3% #198 1,529 0 0
25 2021 10–21 32.3% #81 1,729 0 1 — — — — — — —
26 2022 19–17 52.8% #36 1,856 0 2 — — — — — — —
27 2023 20–21 48.8% #47 1,820 0 2 — — — — — — —
28 2024 16–19 45.7% #69 1,750 0 3 — — — — — — —
29 2025 8–17 32.0% #110 1,705 0 3 — — — — — — —

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 Yoshihito Nishioka Stefan Kozlov
Yr HardClayGrass Yr HardClayGrass
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 2014 0 1 1 0.0% — — — — — — — — 2016 — — — — — — — — 3 2 5 60.0%
19 2015 3 4 7 42.9% 0 1 1 0.0% — — — — 2017 0 6 6 0.0% — — — — 2 3 5 40.0%
20 2016 8 10 18 44.4% — — — — 0 2 2 0.0% 2018 — — — — 0 1 1 0.0% — — — —
21 2017 9 7 16 56.3% — — — — — — — — — — — — — — — — — — — — —
22 2018 9 8 17 52.9% 0 2 2 0.0% 0 1 1 0.0% 2020 0 1 1 0.0% — — — — — — — —
23 2019 15 13 28 53.6% 2 5 7 28.6% 0 1 1 0.0% 2021 0 1 1 0.0% — — — — — — — —
24 2020 10 7 17 58.8% 2 4 6 33.3% — — — — 2022 4 6 10 40.0% — — — — 0 2 2 0.0%
25 2021 3 13 16 18.8% 6 5 11 54.5% 1 3 4 25.0% — — — — — — — — — — — — —
26 2022 19 14 33 57.6% 0 2 2 0.0% 0 1 1 0.0% — — — — — — — — — — — — —
27 2023 15 16 31 48.4% 5 4 9 55.6% 0 1 1 0.0% — — — — — — — — — — — — —
28 2024 11 12 23 47.8% 2 5 7 28.6% 3 2 5 60.0% — — — — — — — — — — — — —
29 2025 8 13 21 38.1% 0 2 2 0.0% 0 2 2 0.0% — — — — — — — — — — — — —
Career — 110 118 228 48.2% 17 30 47 36.2% 4 13 17 23.5% — 4 17 21 19.0% 0 1 1 0.0% 5 8 13 38.5%

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 287/292 of Yoshihito Nishioka's and 35/35 of Stefan Kozlov'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 Yoshihito Nishioka Stefan Kozlov
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 2014 1/1 1.0 5.0 54.5% 58.3% 33.3% 50.0% — 47.0% 20.0% 2016 5/5 4.2 4.8 55.8% 67.8% 41.9% 67.2% 40.4% 56.9% 38.4%
19 2015 8/8 1.8 2.3 58.9% 59.1% 53.3% 48.5% 27.4% 57.1% 36.9% 2017 11/11 3.6 4.1 58.0% 65.2% 44.1% 53.2% 35.0% 56.5% 32.9%
20 2016 20/20 2.2 2.3 60.3% 69.4% 54.3% 53.3% 40.9% 63.6% 36.7% 2018 1/1 2.0 5.0 50.9% 65.5% 35.7% 20.0% 50.0% 50.9% 28.0%
21 2017 16/16 1.3 2.0 62.8% 66.4% 54.6% 61.8% 47.5% 61.7% 38.3% — —/— — — — — — — — — —
22 2018 20/20 1.0 2.0 67.8% 59.8% 52.0% 47.9% 35.8% 57.2% 36.5% 2020 1/1 1.0 5.0 68.5% 54.1% 57.1% 36.4% 50.0% 55.1% 31.7%
23 2019 35/36 2.3 1.4 66.4% 62.9% 54.5% 52.4% 49.7% 60.1% 38.2% 2021 1/1 1.0 1.0 76.4% 54.8% 61.5% 42.9% 25.0% 56.4% 32.7%
24 2020 23/23 2.2 1.3 66.8% 63.6% 56.3% 57.1% 36.3% 60.9% 37.7% 2022 12/12 1.6 4.8 72.4% 60.0% 43.6% 59.6% 35.7% 55.2% 36.0%
25 2021 30/31 1.4 1.8 66.6% 62.1% 48.3% 50.4% 32.5% 57.6% 34.3% — —/— — — — — — — — — —
26 2022 36/36 2.3 1.1 66.9% 63.1% 55.8% 55.3% 45.3% 60.7% 36.1% — —/— — — — — — — — — —
27 2023 41/41 2.1 1.9 64.0% 64.7% 55.0% 51.9% 41.5% 61.2% 35.0% — —/— — — — — — — — — —
28 2024 33/35 2.4 1.4 63.2% 66.9% 57.0% 57.2% 47.9% 63.1% 35.0% — —/— — — — — — — — — —
29 2025 24/25 2.5 2.1 61.1% 68.5% 50.0% 55.8% 36.2% 61.1% 31.5% — —/— — — — — — — — — —
Career — 287/293 2.0 1.7 64.6% 64.4% 53.9% 53.9% 41.3% 60.6% 35.8% — 35/35 2.6 4.3 62.0% 62.4% 43.9% 54.8% 38.2% 55.1% 35.3%

Advanced Statistics Comparison by Age

Seasons are aligned by the age each player spent most of that calendar year. Metrics use eligible main-draw results; point statistics use matches with detailed data. 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 Yoshihito Nishioka Stefan Kozlov
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 2013 1490 90.4 — — — — — — — — — — — — — 2015 1420 101.3 -5.76 -0.97 0.718 41.8% — — — 0.0% -3.50 — — — +0.21
18 2014 1543 109.4 +1.14 -3.46 0.377 36.0% — — — — — — — — +0.11 2016 1481 107.5 -3.43 +1.33 0.891 48.1% — — +119 54.5% +0.09 1–0 — — -0.03
19 2015 1644 119.7 -3.46 -0.53 0.861 47.0% -13 — — 36.4% -0.82 1–1 0–2 — +0.03 2017 1550 118.7 -5.47 -0.25 0.757 44.9% -74 — +123 21.7% -1.70 2–1 (67%) 0–3 (0%) 100.1 +0.21
20 2016 1716 132.9 -0.81 +0.81 1.008 49.9% +16 — — 39.6% -0.60 2–5 (29%) 1–2 (33%) — +0.70 2018 1528 106.2 +0.19 -0.20 0.570 40.2% — — — 0.0% -3.50 — — — -0.08
21 2017 1834 144.6 -1.82 +2.38 0.999 50.4% +15 — — 53.8% +0.13 4–2 (67%) 1–2 (33%) — -0.26 2019 1514 100.9 — — — — — — — — — — — — —
22 2018 1853 148.4 -3.91 +1.07 0.854 47.2% +44 — — 44.2% -0.65 4–3 (57%) 6–1 (86%) 106.1 -1.77 2020 1514 104.1 -1.24 +2.90 0.705 43.9% — — — 33.3% -2.33 0–1 1–0 — -0.06
23 2019 1844 147.6 -2.51 +1.89 0.959 49.2% +27 -195 — 50.0% -0.21 6–7 (46%) 8–6 (57%) 100.2 -1.58 2021 1550 110.6 +2.69 +0.42 0.749 44.9% — — — 0.0% -3.00 — — — +0.04
24 2020 1816 141.3 -1.50 +1.15 0.964 49.2% +51 -185 — 50.8% -0.15 6–4 (60%) 5–4 (56%) 100.5 -0.25 2022 1530 118.4 -4.38 +0.86 0.803 45.9% +20 — — 32.3% -1.48 2–0 1–1 — -0.54
25 2021 1730 130.1 -4.82 -0.85 0.809 45.7% -7 -16 -174 34.2% -1.37 6–2 (75%) 7–3 (70%) 107.0 -1.93 2023 1458 91.9 — — — — — — — — — — — — —
26 2022 1856 148.9 -1.45 +0.59 0.919 48.9% +50 — — 48.4% -0.16 9–4 (69%) 9–7 (56%) 106.5 -0.18 2024 1433 92.7 — — — — — — — — — — — — —
27 2023 1821 145.5 -1.84 -0.11 0.901 48.2% +18 -79 — 47.7% -0.46 10–6 (63%) 8–9 (47%) 101.4 -0.26 2025 1436 101.4 — — — — — — — — — — — — —
28 2024 1751 140.1 -1.21 -0.13 0.948 49.2% +8 -42 -147 49.4% -0.19 7–6 (54%) 8–4 (67%) 103.8 -0.24 2026 1418 97.5 — — — — — — — — — — — — —
29 2025 1705 132.6 -1.89 -3.28 0.809 46.9% +30 — — 36.2% -0.95 3–3 (50%) 4–5 (44%) 99.7 -1.21 — — — — — — — — — — — — — — — —
30 2026 1669 100.1 — — — — — — — — — — — — — — — — — — — — — — — — — — — — —
Career — 1929 146.9 -2.19 +0.24 0.908 48.3% +25 -91 -159 45.4% -0.47 58–43 (57%) 57–45 (56%) 107.6 -2.38 — 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

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.