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

John Isner vs Bradley Klahn H2H: 3-0

John Isner holds a 3–0 lead over Bradley Klahn in their ATP head-to-head. Across 3 main-draw meetings, John Isner leads 3–0 on hard courts. Most recently, John Isner won the 2018 Stockholm Open second round 7-6(2) 6-7(5) 7-6(5).

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John Isner
USA Age 41 Right-Handed 208 cm / 6'10"
H2H
3 – 0
3 main draw meetings
Bradley Klahn
USA Age 36 Left-Handed 183 cm / 6'0"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
John Isner #10 7-6(2) 6-7(5) 7-6(5) Bradley Klahn #102 Match data Oct 19, 2018* R16 Stockholm Open ATP 250 Hard
John Isner #11 7-6(3) 6-3 6-4 Bradley Klahn #92 Match data Aug 29, 2018* R128 US Open Grand Slam Hard
John Isner #15 7-6(5) 6-2 Bradley Klahn #117 Match data Aug 20, 2014* R32 Winston-Salem Open ATP 250 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
John Isner #660 #8 3,720 2,068 470 294 61.5% 0 1 0 0 15 16
Bradley Klahn #1,096 #63 731 1,734 13 43 23.2% 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 John Isner Bradley Klahn
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
19 — — — — — — — 2010 0–1 0.0% — 1,499 0 0
20 — — — — — — — 2011 0–1 0.0% — 1,525 0 0
21 — — — — — — — 2012 1–2 33.3% #248 1,638 0 0
22 2007 8–5 61.5% #106 1,656 0 0 2013 1–3 25.0% #97 1,602 0 0
23 2008 11–19 36.7% #144 1,607 0 0 2014 2–11 15.4% #148 1,549 0 0
24 2009 27–18 60.0% #34 1,829 0 0 — — — — — — —
25 2010 38–20 65.5% #19 1,884 0 1 — — — — — — —
26 2011 34–19 64.2% #18 2,020 0 3 — — — — — — —
27 2012 41–19 68.3% #14 1,977 0 5 2018 5–8 38.5% #76 1,708 0 0
28 2013 38–22 63.3% #14 1,984 0 7 2019 4–14 22.2% #135 1,645 0 0
29 2014 37–21 63.8% #19 1,935 0 9 2020 0–1 0.0% #149 1,570 0 0
30 2015 45–23 66.2% #11 2,028 0 10 — — — — — — —
31 2016 30–20 60.0% #19 2,021 0 10 2022 0–1 0.0% #873 1,485 0 0
32 2017 36–21 63.2% #17 1,985 0 12 2023 0–1 0.0% #877 1,479 0 0
33 2018 32–22 59.3% #10 1,958 0 14 — — — — — — —
34 2019 29–17 63.0% #19 1,922 0 15 — — — — — — —
35 2020 10–7 58.8% #25 1,845 0 15 — — — — — — —
36 2021 23–11 67.6% #24 1,945 0 16 — — — — — — —
37 2022 22–16 57.9% #41 1,925 0 16 — — — — — — —
38 2023 9–14 39.1% #172 1,711 0 16 — — — — — — —

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 John Isner Bradley Klahn
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 %
19 — — — — — — — — — — — — — 2010 0 1 1 0.0% — — — — — — — —
20 — — — — — — — — — — — — — 2011 0 1 1 0.0% — — — — — — — —
21 — — — — — — — — — — — — — 2012 1 2 3 33.3% — — — — — — — —
22 2007 8 4 12 66.7% — — — — 0 1 1 0.0% 2013 1 2 3 33.3% 0 1 1 0.0% — — — —
23 2008 9 12 21 42.9% 1 3 4 25.0% 1 4 5 20.0% 2014 2 7 9 22.2% 0 1 1 0.0% 0 3 3 0.0%
24 2009 25 17 42 59.5% 2 1 3 66.7% — — — — — — — — — — — — — — — — —
25 2010 29 13 42 69.0% 8 6 14 57.1% 1 1 2 50.0% — — — — — — — — — — — — —
26 2011 26 13 39 66.7% 2 5 7 28.6% 6 1 7 85.7% — — — — — — — — — — — — —
27 2012 27 12 39 69.2% 6 5 11 54.5% 8 2 10 80.0% 2018 4 7 11 36.4% — — — — 1 1 2 50.0%
28 2013 26 14 40 65.0% 8 5 13 61.5% 4 3 7 57.1% 2019 3 9 12 25.0% 0 2 2 0.0% 1 3 4 25.0%
29 2014 27 14 41 65.9% 6 5 11 54.5% 4 2 6 66.7% 2020 0 1 1 0.0% — — — — — — — —
30 2015 31 14 45 68.9% 10 6 16 62.5% 4 3 7 57.1% — — — — — — — — — — — — —
31 2016 22 13 35 62.9% 5 5 10 50.0% 3 2 5 60.0% 2022 0 1 1 0.0% — — — — — — — —
32 2017 23 14 37 62.2% 7 4 11 63.6% 6 3 9 66.7% 2023 0 1 1 0.0% — — — — — — — —
33 2018 20 16 36 55.6% 7 5 12 58.3% 5 1 6 83.3% — — — — — — — — — — — — —
34 2019 24 16 40 60.0% — — — — 5 1 6 83.3% — — — — — — — — — — — — —
35 2020 9 6 15 60.0% 1 1 2 50.0% — — — — — — — — — — — — — — — — —
36 2021 18 8 26 69.2% 5 2 7 71.4% 0 1 1 0.0% — — — — — — — — — — — — —
37 2022 11 10 21 52.4% 7 4 11 63.6% 4 2 6 66.7% — — — — — — — — — — — — —
38 2023 6 10 16 37.5% 0 2 2 0.0% 3 2 5 60.0% — — — — — — — — — — — — —
Career — 341 206 547 62.3% 75 59 134 56.0% 54 29 83 65.1% — 11 32 43 25.6% 0 4 4 0.0% 2 7 9 22.2%

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 756/764 of John Isner's and 56/56 of Bradley Klahn'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 John Isner Bradley Klahn
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%
19 — —/— — — — — — — — — — 2010 1/1 6.0 7.0 69.5% 69.2% 40.0% 56.3% 27.3% 60.3% 31.3%
20 — —/— — — — — — — — — — 2011 1/1 1.0 4.0 58.0% 62.1% 42.9% 40.0% 0.0% 54.0% 22.4%
21 — —/— — — — — — — — — — 2012 3/3 7.3 4.3 64.4% 62.3% 41.6% 60.4% 44.4% 55.0% 37.4%
22 2007 13/13 19.6 3.1 67.2% 78.2% 59.4% 65.5% 19.8% 71.9% 26.6% 2013 4/4 8.0 2.3 66.9% 73.3% 51.5% 25.0% 33.5% 65.9% 33.7%
23 2008 29/30 15.0 3.4 66.9% 77.1% 52.3% 60.0% 26.1% 68.8% 27.4% 2014 13/13 6.7 5.5 58.6% 66.8% 46.4% 53.4% 33.7% 58.4% 32.0%
24 2009 45/45 14.5 2.5 67.1% 75.0% 57.4% 65.9% 29.5% 69.1% 30.0% — —/— — — — — — — — — —
25 2010 58/58 17.8 2.3 69.1% 76.5% 55.9% 68.0% 39.3% 70.1% 29.9% — —/— — — — — — — — — —
26 2011 53/53 15.2 2.8 69.2% 78.0% 55.6% 62.5% 40.1% 71.2% 31.5% — —/— — — — — — — — — —
27 2012 56/60 16.7 2.2 67.9% 78.2% 57.0% 72.2% 33.2% 71.6% 31.1% 2018 13/13 9.2 4.5 59.8% 75.5% 53.9% 50.6% 38.6% 66.9% 28.2%
28 2013 60/60 16.3 1.7 67.7% 79.4% 57.8% 66.5% 33.7% 72.2% 31.1% 2019 18/18 8.8 4.6 59.5% 72.2% 52.6% 60.3% 34.4% 64.4% 29.4%
29 2014 57/58 17.4 1.8 67.8% 79.1% 57.8% 73.0% 27.3% 72.1% 30.2% 2020 1/1 10.0 5.0 62.9% 63.0% 44.2% 64.7% 50.0% 56.0% 26.1%
30 2015 68/68 18.5 1.8 70.3% 80.2% 58.6% 74.8% 37.5% 73.8% 29.6% — —/— — — — — — — — — —
31 2016 50/50 23.2 2.7 69.2% 82.4% 55.3% 68.3% 35.9% 73.9% 30.7% 2022 1/1 6.0 3.0 52.2% 58.3% 54.5% 50.0% — 56.5% 20.0%
32 2017 57/57 19.7 2.2 70.6% 80.6% 56.5% 63.6% 41.2% 73.5% 29.1% 2023 1/1 4.0 5.0 68.9% 66.7% 31.6% 66.7% 0.0% 55.7% 23.5%
33 2018 54/54 22.4 2.4 69.1% 81.3% 56.7% 70.1% 30.6% 73.7% 29.7% — —/— — — — — — — — — —
34 2019 46/46 21.8 1.7 71.0% 81.4% 58.6% 70.1% 34.2% 74.7% 29.8% — —/— — — — — — — — — —
35 2020 17/17 21.9 3.5 71.5% 78.6% 54.9% 84.1% 25.0% 72.2% 28.8% — —/— — — — — — — — — —
36 2021 33/34 20.6 2.1 68.5% 79.0% 55.9% 62.7% 34.5% 71.8% 28.4% — —/— — — — — — — — — —
37 2022 37/38 22.6 2.8 68.8% 80.3% 54.1% 64.9% 36.6% 72.1% 27.7% — —/— — — — — — — — — —
38 2023 23/23 20.9 2.9 67.7% 79.7% 57.4% 72.2% 18.8% 72.3% 28.0% — —/— — — — — — — — — —
Career — 756/764 18.8 2.3 68.9% 79.2% 56.7% 68.4% 33.7% 72.2% 29.8% — 56/56 7.9 4.6 60.4% 70.5% 49.9% 53.5% 34.0% 62.5% 30.1%

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 John Isner Bradley Klahn
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
19 — — — — — — — — — — — — — — — — 2010 1499 108.4 -1.52 +3.65 0.787 46.9% — — — 25.0% -1.25 — — — -0.11
20 — — — — — — — — — — — — — — — — 2011 1525 112.8 +0.69 +0.59 0.488 38.4% — — — 0.0% -3.50 — — — -0.19
21 — — — — — — — — — — — — — — — — 2012 1639 117.2 -2.52 -0.18 0.831 46.8% +35 — — 36.4% -1.18 1–1 — — +0.09
22 2007 1656 138.0 +5.43 -3.75 0.947 49.4% +37 — — 54.1% -0.19 5–1 (83%) 12–7 (63%) — +0.01 2013 1603 112.5 -1.91 -0.65 0.991 48.3% +55 — — 33.3% -0.67 — 2–3 (40%) — +0.13
23 2008 1608 128.0 +4.14 -6.69 0.881 48.3% +39 -96 -116 41.0% -0.51 4–8 (33%) 13–12 (52%) — +0.16 2014 1550 122.4 -3.31 -2.26 0.770 45.5% +73 — -31 30.0% -1.58 2–4 (33%) 6–2 (75%) — -0.32
24 2009 1830 145.6 +4.72 -4.63 0.972 50.0% +1 -280 — 57.0% +0.23 12–6 (67%) 26–12 (68%) — +0.93 2015 1548 102.5 — — — — — — — — — — — — —
25 2010 1885 154.2 +5.86 -4.84 1.002 50.5% +41 -194 — 58.8% +0.34 19–9 (68%) 32–16 (67%) — +2.28 — — — — — — — — — — — — — — — —
26 2011 2020 160.4 +7.13 -3.98 1.097 51.5% +30 -361 -297 61.6% +0.53 11–11 (50%) 32–20 (62%) — +1.83 2017 1549 103.9 — — — — — — — — — — — — —
27 2012 1978 157.8 +7.12 -4.36 1.092 51.3% +43 -260 -71 62.7% +0.43 15–10 (60%) 38–18 (68%) — +3.35 2018 1709 132.3 +1.07 -2.48 0.852 48.3% -22 — — 38.2% -0.56 2–2 (50%) 5–5 (50%) — -0.18
28 2013 1985 159.0 +7.64 -3.71 1.119 51.3% +52 -198 -94 59.5% +0.36 18–11 (62%) 36–17 (68%) — +3.48 2019 1646 123.8 -0.08 -4.65 0.825 47.6% +21 — -93 28.3% -1.00 1–2 (33%) 4–6 (40%) — 0.00
29 2014 1935 157.9 +7.20 -4.42 1.079 50.8% +50 -99 -27 61.8% +0.44 12–6 (67%) 41–21 (66%) — +3.24 2020 1570 96.9 -1.18 -3.05 0.594 43.1% — — — 25.0% -2.50 — — — +0.34
30 2015 2029 168.0 +8.71 -4.22 1.132 51.6% +54 -121 -120 62.7% +0.57 12–9 (57%) 39–25 (61%) — +3.80 — — — — — — — — — — — — — — — —
31 2016 2021 163.0 +8.76 -3.60 1.179 51.8% +44 -140 -79 58.6% +0.48 9–10 (47%) 31–30 (51%) — +1.41 2022 1485 106.5 -0.77 -0.68 0.460 42.1% — — — 0.0% -3.00 — — — -0.01
32 2017 1986 158.3 +8.00 -5.60 1.094 51.2% +14 -91 -60 60.0% +0.42 11–9 (55%) 40–24 (63%) — +3.24 2023 1480 104.5 +0.15 -2.16 0.532 41.1% — — — 0.0% -3.00 — — — +0.02
33 2018 1959 158.8 +8.37 -4.32 1.129 51.3% -23 -61 +77 57.0% +0.42 14–11 (56%) 37–32 (54%) — +2.48 — — — — — — — — — — — — — — — —
34 2019 1922 154.7 +8.16 -3.97 1.178 51.7% -6 — +115 61.2% +0.47 8–7 (53%) 29–23 (56%) — +3.19 — — — — — — — — — — — — — — — —
35 2020 1846 134.4 +4.91 -4.34 1.035 50.7% +22 — — 60.9% +0.50 3–3 (50%) 14–7 (67%) — +1.74 — — — — — — — — — — — — — — — —
36 2021 1945 152.3 +6.93 -5.43 1.006 50.2% 0 +9 — 62.5% +0.27 10–5 (67%) 21–9 (70%) — +0.90 — — — — — — — — — — — — — — — —
37 2022 1926 145.5 +6.21 -5.79 0.996 49.8% -21 +13 +80 55.1% -0.02 11–8 (58%) 30–17 (64%) — +1.11 — — — — — — — — — — — — — — — —
38 2023 1711 125.8 +5.40 -5.66 1.012 49.9% +36 — +244 45.3% -0.14 3–6 (33%) 11–17 (39%) — +1.74 — — — — — — — — — — — — — — — —
Career — 2068 162.0 +7.10 -4.58 1.071 50.9% +25 -137 -39 58.7% +0.34 177–130 (58%) 482–307 (61%) 111.1 +4.58 — 1734 124.5 -0.86 -2.68 0.801 46.8% +25 — -66 30.6% -1.17 6–9 (40%) 17–16 (52%) 101.2 -0.41

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.