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

Kei Nishikori vs Sam Groth H2H: 2-0

Kei Nishikori holds a 2–0 lead over Sam Groth in their ATP head-to-head. Across 2 main-draw meetings, Kei Nishikori leads 1–0 on grass and 1–0 on hard courts. Most recently, Kei Nishikori won the 2016 Wimbledon first round 6-4 6-3 7-5.

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Kei Nishikori
Japan Age 36 Right-Handed 178 cm / 5'10"
H2H
2 – 0
2 main draw meetings
Sam Groth
AUS Age 38 Right-Handed 193 cm / 6'4"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Kei Nishikori #6 6-4 6-3 7-5 Sam Groth #124 Match data Jun 29, 2016* R128 Wimbledon Grand Slam Grass
Kei Nishikori #5 6-4 6-4 Sam Groth #62 Match data Aug 8, 2015* QF Washington Open ATP 500 Hard

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
Kei Nishikori #481 #4 6,385 2,275 436 232 65.3% 0 0 0 6 6 12
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 Kei Nishikori Sam Groth
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
17 2007 3–5 37.5% #286 1,576 0 0 — — — — — — —
18 2008 16–11 59.3% #63 1,758 0 1 — — — — — — —
19 2009 3–6 33.3% #418 1,723 0 1 — — — — — — —
20 2010 3–9 25.0% #98 1,735 0 1 2008 1–1 50.0% #278 1,556 0 0
21 2011 32–22 59.3% #25 1,923 0 1 2009 1–2 33.3% #279 1,548 0 0
22 2012 35–18 66.0% #19 2,007 0 2 — — — — — — —
23 2013 34–19 64.2% #17 1,946 0 3 — — — — — — —
24 2014 52–15 77.6% #5 2,211 0 7 — — — — — — —
25 2015 51–17 75.0% #8 2,153 0 10 2013 1–3 25.0% #172 1,553 0 0
26 2016 57–21 73.1% #5 2,183 0 11 2014 9–13 40.9% #81 1,707 0 0
27 2017 30–14 68.2% #22 2,080 0 11 2015 18–21 46.2% #60 1,796 0 0
28 2018 43–21 67.2% #9 2,107 0 11 2016 4–15 21.1% #180 1,636 0 0
29 2019 29–14 67.4% #13 2,002 0 12 2017 2–3 40.0% #248 1,594 0 0
30 2020 2–4 33.3% #41 1,912 0 12 — — — — — — —
31 2021 27–16 62.8% #47 1,978 0 12 — — — — — — —
33 2023 2–1 66.7% #352 1,968 0 12 — — — — — — —
34 2024 7–9 43.8% #106 1,871 0 12 — — — — — — —
35 2025 9–9 50.0% #156 1,814 0 12 — — — — — — —
36 2026 1–1 50.0% #481 1,770 0 12 — — — — — — —

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 Kei Nishikori Sam Groth
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 %
17 2007 3 5 8 37.5% — — — — — — — — — — — — — — — — — — — — —
18 2008 14 7 21 66.7% 0 1 1 0.0% 2 3 5 40.0% — — — — — — — — — — — — —
19 2009 3 6 9 33.3% — — — — — — — — — — — — — — — — — — — — —
20 2010 2 5 7 28.6% 1 1 2 50.0% 0 3 3 0.0% 2008 — — — — — — — — 1 1 2 50.0%
21 2011 22 14 36 61.1% 7 5 12 58.3% 3 3 6 50.0% 2009 0 1 1 0.0% — — — — 1 1 2 50.0%
22 2012 21 11 32 65.6% 7 4 11 63.6% 7 3 10 70.0% — — — — — — — — — — — — —
23 2013 24 13 37 64.9% 8 4 12 66.7% 2 2 4 50.0% — — — — — — — — — — — — —
24 2014 37 11 48 77.1% 10 2 12 83.3% 5 2 7 71.4% — — — — — — — — — — — — —
25 2015 33 12 45 73.3% 14 3 17 82.4% 4 2 6 66.7% 2013 1 2 3 33.3% — — — — 0 1 1 0.0%
26 2016 40 15 55 72.7% 13 4 17 76.5% 4 2 6 66.7% 2014 6 11 17 35.3% — — — — 3 2 5 60.0%
27 2017 15 6 21 71.4% 12 6 18 66.7% 3 2 5 60.0% 2015 12 15 27 44.4% 1 3 4 25.0% 5 3 8 62.5%
28 2018 27 14 41 65.9% 11 5 16 68.8% 5 2 7 71.4% 2016 2 11 13 15.4% 0 1 1 0.0% 2 3 5 40.0%
29 2019 15 8 23 65.2% 10 5 15 66.7% 4 1 5 80.0% 2017 1 2 3 33.3% — — — — 1 1 2 50.0%
30 2020 — — — — 2 4 6 33.3% — — — — — — — — — — — — — — — — —
31 2021 17 10 27 63.0% 8 4 12 66.7% 2 2 4 50.0% — — — — — — — — — — — — —
33 2023 2 1 3 66.7% — — — — — — — — — — — — — — — — — — — — —
34 2024 6 6 12 50.0% 1 2 3 33.3% 0 1 1 0.0% — — — — — — — — — — — — —
35 2025 6 6 12 50.0% 3 3 6 50.0% — — — — — — — — — — — — — — — — —
36 2026 1 1 2 50.0% — — — — — — — — — — — — — — — — — — — — —
Career — 288 151 439 65.6% 107 53 160 66.9% 41 28 69 59.4% — 22 42 64 34.4% 1 4 5 20.0% 13 12 25 52.0%

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 643/668 of Kei Nishikori'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 Kei Nishikori 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%
17 2007 8/8 3.0 3.5 58.6% 69.8% 47.8% 60.4% 48.1% 60.9% 35.4% — —/— — — — — — — — — —
18 2008 25/27 3.2 2.9 59.9% 69.1% 50.9% 57.2% 45.4% 61.8% 37.4% — —/— — — — — — — — — —
19 2009 9/9 2.8 3.1 53.7% 64.6% 49.4% 39.4% 45.3% 57.3% 37.7% — —/— — — — — — — — — —
20 2010 12/12 3.1 4.0 60.3% 64.3% 43.5% 45.8% 23.0% 56.4% 33.0% 2008 2/2 19.0 6.0 54.6% 87.5% 56.2% 78.6% 37.5% 72.7% 33.2%
21 2011 54/54 2.5 2.9 60.7% 68.5% 52.4% 59.5% 39.7% 62.0% 38.2% 2009 3/3 10.3 8.3 49.4% 71.0% 48.2% 60.8% 100.0% 59.3% 28.8%
22 2012 48/53 2.4 2.6 62.6% 70.0% 53.6% 55.2% 39.9% 63.6% 41.4% — —/— — — — — — — — — —
23 2013 53/53 2.6 2.8 62.3% 68.9% 52.2% 55.7% 47.2% 62.6% 40.6% — —/— — — — — — — — — —
24 2014 66/67 4.3 2.8 60.6% 73.4% 53.9% 63.1% 42.6% 65.6% 39.9% — —/— — — — — — — — — —
25 2015 66/68 4.6 2.5 59.6% 74.7% 54.5% 62.3% 44.7% 66.6% 39.3% 2013 4/4 15.5 5.0 64.1% 72.9% 54.7% 64.2% 24.1% 65.9% 32.3%
26 2016 71/78 3.4 2.4 61.0% 72.3% 53.9% 64.1% 47.7% 65.1% 40.2% 2014 22/22 15.6 4.2 61.8% 81.6% 54.3% 67.8% 30.8% 71.1% 28.8%
27 2017 43/44 3.3 2.3 62.3% 71.9% 53.3% 64.2% 45.5% 64.9% 40.7% 2015 39/39 16.0 4.6 61.6% 78.8% 51.4% 66.5% 26.3% 68.1% 28.5%
28 2018 64/64 3.6 2.3 60.0% 71.3% 55.9% 60.0% 44.8% 65.2% 37.8% 2016 18/19 14.8 5.8 58.0% 77.3% 46.6% 63.5% 44.8% 64.2% 29.4%
29 2019 43/43 3.1 2.8 63.6% 70.1% 54.2% 51.2% 45.0% 64.3% 40.9% 2017 5/5 15.8 6.4 56.3% 79.2% 48.1% 67.4% 39.9% 65.9% 26.2%
30 2020 6/6 1.2 2.5 63.5% 62.2% 50.7% 57.8% 31.4% 58.0% 37.8% — —/— — — — — — — — — —
31 2021 37/43 2.5 2.0 64.2% 65.6% 55.3% 57.2% 45.2% 62.0% 38.5% — —/— — — — — — — — — —
33 2023 3/3 1.7 1.3 67.5% 73.8% 53.6% 52.8% 16.7% 67.2% 29.9% — —/— — — — — — — — — —
34 2024 15/16 2.1 1.7 66.6% 66.7% 55.0% 58.6% 39.7% 62.7% 36.1% — —/— — — — — — — — — —
35 2025 18/18 3.2 1.9 65.6% 68.6% 47.6% 53.2% 35.9% 61.9% 35.2% — —/— — — — — — — — — —
36 2026 2/2 2.0 1.0 60.0% 72.0% 55.5% 0.0% 11.0% 64.0% 32.0% — —/— — — — — — — — — —
Career — 643/668 3.3 2.6 61.5% 70.5% 53.3% 58.6% 43.3% 63.8% 39.1% — 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 Kei Nishikori 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
17 2007 1576 116.9 -2.68 -0.02 0.904 48.6% +35 — — 38.9% -0.83 1–1 1–1 — +0.05 — — — — — — — — — — — — — — — —
18 2008 1758 125.8 -0.30 +0.72 0.981 49.7% +19 — -131 50.8% -0.10 8–2 (80%) 4–2 (67%) — +0.07 — — — — — — — — — — — — — — — —
19 2009 1724 129.5 -3.16 +1.29 0.884 47.6% +12 — — 35.3% -1.06 — 1–0 — -0.98 — — — — — — — — — — — — — — — —
20 2010 1735 129.7 -2.46 -1.12 0.757 44.8% +5 — -69 25.9% -1.74 2–1 (67%) 3–0 (100%) — -1.08 2008 1557 104.1 +1.47 -1.35 1.219 53.0% — — — 60.0% +0.20 0–1 2–0 — +0.15
21 2011 1923 151.1 -0.10 +1.28 1.007 50.3% +11 -301 -200 53.4% +0.20 14–3 (82%) 12–9 (57%) — +0.32 2009 1548 110.5 -1.72 -0.48 0.708 45.0% — — — 33.3% -1.44 1–0 1–0 — +0.28
22 2012 2007 156.0 +1.03 +3.76 1.139 52.0% +15 -248 -162 59.8% +0.79 15–4 (79%) 9–8 (53%) — +1.94 2010 1527 100.7 — — — — — — — — — — — — —
23 2013 1946 158.7 -0.22 +3.58 1.086 51.5% +28 -64 -111 62.7% +0.75 6–4 (60%) 9–7 (56%) — +3.21 2011 1493 100.0 — — — — — — — — — — — — —
24 2014 2211 173.9 +2.73 +4.62 1.162 52.6% +18 -194 -285 68.2% +1.09 21–2 (91%) 19–10 (66%) — -0.99 2012 1479 100.4 — — — — — — — — — — — — —
25 2015 2153 175.0 +2.66 +4.32 1.175 52.6% +22 +6 -165 69.5% +1.23 17–6 (74%) 9–12 (43%) — +2.30 2013 1553 113.3 -1.09 +0.67 0.946 49.0% -20 — — 40.0% -0.60 0–2 2–0 — -0.22
26 2016 2183 179.2 +2.13 +4.67 1.151 52.6% +16 +25 -149 69.4% +1.15 14–5 (74%) 16–9 (64%) — -1.29 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 2017 2080 165.7 +1.81 +4.17 1.159 52.4% +66 +70 -116 63.6% +0.88 12–5 (71%) 9–10 (47%) — -0.06 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 2018 2107 171.3 +1.83 +2.94 1.086 51.5% +11 +66 -54 62.6% +0.63 12–5 (71%) 17–5 (77%) — -1.99 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 2019 2002 158.4 +0.34 +4.57 1.145 52.3% +1 +149 +96 62.7% +0.73 8–6 (57%) 9–7 (56%) — +1.02 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 2020 1913 109.6 -1.35 -0.42 0.900 47.5% — +89 — 42.1% -0.95 1–2 (33%) 2–1 (67%) — +0.14 2018 1572 104.4 — — — — — — — — — — — — —
31 2021 1978 161.2 -0.40 +2.72 1.013 50.2% +38 +96 +56 55.2% +0.23 14–7 (67%) 9–8 (53%) — -2.26 — — — — — — — — — — — — — — — —
33 2023 1968 114.7 +1.39 +0.98 0.912 49.4% +49 — — 66.7% -0.17 — 3–0 (100%) — -0.03 — — — — — — — — — — — — — — — —
34 2024 1872 134.6 -0.60 +0.92 0.967 49.3% +66 +121 — 45.0% -0.42 4–2 (67%) 2–2 (50%) — -0.17 — — — — — — — — — — — — — — — —
35 2025 1814 129.1 -1.20 -0.68 0.924 48.6% +64 +99 — 47.6% -0.24 6–2 (75%) 2–2 (50%) — -1.30 — — — — — — — — — — — — — — — —
36 2026 1771 106.9 +1.53 -0.54 0.889 47.0% — — — 40.0% -0.60 1–0 0–1 — -0.11 — — — — — — — — — — — — — — — —
Career — 2275 168.2 +0.96 +3.18 1.082 51.3% +23 -11 -121 60.7% +0.61 156–57 (73%) 136–94 (59%) 115.6 -0.18 — 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.