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

John Isner vs Ivo Karlovic H2H: 2-3

Ivo Karlovic holds a 3–2 lead over John Isner in their ATP head-to-head. Across 5 main-draw meetings, Ivo Karlovic leads 2–1 on hard courts and 1–0 on clay. Most recently, Ivo Karlovic won the 2014 Mexican Open first round 7-6(4) 7-6(5).

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John Isner
USA Age 41 Right-Handed 208 cm / 6'10"
H2H
2 – 3
5 main draw meetings
Ivo Karlovic
CRO Age 47 Right-Handed 211 cm / 6'11"

H2H Match Log

PlayerScorePlayerMatch DataDateRoundTournamentCategorySurface
Ivo Karlovic #55 7-6(4) 7-6(5) John Isner #13 Match data Feb 26, 2014* R32 Mexican Open ATP 500 Hard
John Isner #19 7-6(3) 7-6(3) Ivo Karlovic #167 Match data Jul 13, 2013* QF Newport ATP 250 Grass
Ivo Karlovic #174 7-6(2) 6-7(2) 7-6(9) John Isner #29 Match data Apr 9, 2011* QF U.S. Men's Clay Court Championship ATP 250 Clay
John Isner #25 6-1 7-6(7) Ivo Karlovic #33 Match data Feb 20, 2010* QF Memphis ATP 500 Hard
Ivo Karlovic #14 6-7(4) 6-3 6-4 John Isner #124 Match data Aug 20, 2008* R32 New Haven International Series → modern equivalent 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
Ivo Karlovic #1,066 #14 2,295 1,999 363 335 52.0% 0 0 0 0 8 8

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 Ivo Karlovic
YrW-LWin %RankEloGSTitles YrW-LWin %RankEloGSTitles
22 2007 8–5 61.5% #106 1,656 0 0 2001 0–1 0.0% #193 1,500 0 0
23 2008 11–19 36.7% #144 1,607 0 0 2002 1–2 33.3% #201 1,454 0 0
24 2009 27–18 60.0% #34 1,829 0 0 2003 9–7 56.2% #73 1,665 0 0
25 2010 38–20 65.5% #19 1,884 0 1 2004 18–25 41.9% #61 1,685 0 0
26 2011 34–19 64.2% #18 2,020 0 3 2005 17–22 43.6% #70 1,745 0 0
27 2012 41–19 68.3% #14 1,977 0 5 2006 16–18 47.1% #98 1,633 0 0
28 2013 38–22 63.3% #14 1,984 0 7 2007 45–21 68.2% #22 1,931 0 3
29 2014 37–21 63.8% #19 1,935 0 9 2008 29–25 53.7% #26 1,814 0 4
30 2015 45–23 66.2% #11 2,028 0 10 2009 21–22 48.8% #37 1,797 0 4
31 2016 30–20 60.0% #19 2,021 0 10 2010 16–9 64.0% #73 1,866 0 4
32 2017 36–21 63.2% #17 1,985 0 12 2011 16–20 44.4% #56 1,821 0 4
33 2018 32–22 59.3% #10 1,958 0 14 2012 14–16 46.7% #100 1,769 0 4
34 2019 29–17 63.0% #19 1,922 0 15 2013 15–13 53.6% #78 1,774 0 5
35 2020 10–7 58.8% #25 1,845 0 15 2014 36–28 56.2% #27 1,856 0 5
36 2021 23–11 67.6% #24 1,945 0 16 2015 38–25 60.3% #23 1,917 0 6
37 2022 22–16 57.9% #41 1,925 0 16 2016 32–22 59.3% #20 1,972 0 8
38 2023 9–14 39.1% #172 1,711 0 16 2017 15–20 42.9% #80 1,771 0 8
39 — — — — — — — 2018 11–16 40.7% #100 1,645 0 8
40 — — — — — — — 2019 11–15 42.3% #95 1,675 0 8
41 — — — — — — — 2020 1–4 20.0% #147 1,620 0 8
42 — — — — — — — 2021 2–4 33.3% #279 1,625 0 8

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 Ivo Karlovic
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 %
22 2007 8 4 12 66.7% — — — — 0 1 1 0.0% — — — — 2001 0 1 1 0.0% — — — — — — — — — — — —
23 2008 9 12 21 42.9% 1 3 4 25.0% 1 4 5 20.0% — — — — 2002 1 1 2 50.0% — — — — 0 1 1 0.0% — — — —
24 2009 25 17 42 59.5% 2 1 3 66.7% — — — — — — — — 2003 5 4 9 55.6% 1 1 2 50.0% 3 2 5 60.0% — — — —
25 2010 29 13 42 69.0% 8 6 14 57.1% 1 1 2 50.0% — — — — 2004 6 12 18 33.3% 5 7 12 41.7% 5 3 8 62.5% 2 3 5 40.0%
26 2011 26 13 39 66.7% 2 5 7 28.6% 6 1 7 85.7% — — — — 2005 9 11 20 45.0% 0 6 6 0.0% 7 3 10 70.0% 1 2 3 33.3%
27 2012 27 12 39 69.2% 6 5 11 54.5% 8 2 10 80.0% — — — — 2006 8 11 19 42.1% 6 4 10 60.0% 0 2 2 0.0% 2 1 3 66.7%
28 2013 26 14 40 65.0% 8 5 13 61.5% 4 3 7 57.1% — — — — 2007 30 16 46 65.2% 6 2 8 75.0% 8 2 10 80.0% 1 1 2 50.0%
29 2014 27 14 41 65.9% 6 5 11 54.5% 4 2 6 66.7% — — — — 2008 17 14 31 54.8% 5 8 13 38.5% 7 2 9 77.8% 0 1 1 0.0%
30 2015 31 14 45 68.9% 10 6 16 62.5% 4 3 7 57.1% — — — — 2009 9 15 24 37.5% 5 5 10 50.0% 7 2 9 77.8% — — — —
31 2016 22 13 35 62.9% 5 5 10 50.0% 3 2 5 60.0% — — — — 2010 14 7 21 66.7% 2 2 4 50.0% — — — — — — — —
32 2017 23 14 37 62.2% 7 4 11 63.6% 6 3 9 66.7% — — — — 2011 12 13 25 48.0% 3 4 7 42.9% 1 3 4 25.0% — — — —
33 2018 20 16 36 55.6% 7 5 12 58.3% 5 1 6 83.3% — — — — 2012 12 11 23 52.2% 0 3 3 0.0% 2 2 4 50.0% — — — —
34 2019 24 16 40 60.0% — — — — 5 1 6 83.3% — — — — 2013 13 11 24 54.2% 0 1 1 0.0% 2 1 3 66.7% — — — —
35 2020 9 6 15 60.0% 1 1 2 50.0% — — — — — — — — 2014 24 18 42 57.1% 7 6 13 53.8% 5 4 9 55.6% — — — —
36 2021 18 8 26 69.2% 5 2 7 71.4% 0 1 1 0.0% — — — — 2015 26 18 44 59.1% 1 3 4 25.0% 11 4 15 73.3% — — — —
37 2022 11 10 21 52.4% 7 4 11 63.6% 4 2 6 66.7% — — — — 2016 20 13 33 60.6% 4 6 10 40.0% 8 3 11 72.7% — — — —
38 2023 6 10 16 37.5% 0 2 2 0.0% 3 2 5 60.0% — — — — 2017 8 12 20 40.0% 3 4 7 42.9% 4 4 8 50.0% — — — —
39 — — — — — — — — — — — — — — — — — 2018 4 7 11 36.4% 5 6 11 45.5% 2 3 5 40.0% — — — —
40 — — — — — — — — — — — — — — — — — 2019 9 11 20 45.0% 1 2 3 33.3% 1 2 3 33.3% — — — —
41 — — — — — — — — — — — — — — — — — 2020 1 4 5 20.0% — — — — — — — — — — — —
42 — — — — — — — — — — — — — — — — — 2021 1 3 4 25.0% — — — — 1 1 2 50.0% — — — —
Career — 341 206 547 62.3% 75 59 134 56.0% 54 29 83 65.1% — — — — — 229 213 442 51.8% 54 70 124 43.5% 74 44 118 62.7% 6 8 14 42.9%

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 692/698 of Ivo Karlovic'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 Ivo Karlovic
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%
22 2007 13/13 19.6 3.1 67.2% 78.2% 59.4% 65.5% 19.8% 71.9% 26.6% 2001 1/1 16.0 2.0 76.6% 71.4% 46.7% 60.0% 50.0% 65.6% 32.4%
23 2008 29/30 15.0 3.4 66.9% 77.1% 52.3% 60.0% 26.1% 68.8% 27.4% 2002 2/3 15.0 8.5 53.7% 75.3% 40.4% 71.7% 75.0% 59.2% 28.6%
24 2009 45/45 14.5 2.5 67.1% 75.0% 57.4% 65.9% 29.5% 69.1% 30.0% 2003 16/16 17.6 6.3 61.1% 83.8% 53.3% 73.0% 28.3% 71.9% 29.0%
25 2010 58/58 17.8 2.3 69.1% 76.5% 55.9% 68.0% 39.3% 70.1% 29.9% 2004 40/43 21.1 5.4 61.9% 81.6% 52.8% 63.7% 25.9% 70.3% 26.8%
26 2011 53/53 15.2 2.8 69.2% 78.0% 55.6% 62.5% 40.1% 71.2% 31.5% 2005 39/39 18.7 4.4 63.3% 82.0% 51.5% 69.3% 31.9% 70.9% 25.5%
27 2012 56/60 16.7 2.2 67.9% 78.2% 57.0% 72.2% 33.2% 71.6% 31.1% 2006 34/34 18.3 3.1 65.0% 82.0% 50.3% 70.9% 34.6% 70.7% 28.1%
28 2013 60/60 16.3 1.7 67.7% 79.4% 57.8% 66.5% 33.7% 72.2% 31.1% 2007 64/66 20.6 1.9 68.7% 84.3% 54.5% 71.9% 34.1% 74.9% 29.5%
29 2014 57/58 17.4 1.8 67.8% 79.1% 57.8% 73.0% 27.3% 72.1% 30.2% 2008 54/54 17.8 1.8 66.2% 81.4% 53.2% 66.2% 31.8% 71.8% 30.1%
30 2015 68/68 18.5 1.8 70.3% 80.2% 58.6% 74.8% 37.5% 73.8% 29.6% 2009 43/43 20.7 2.3 66.4% 84.9% 54.8% 62.5% 39.2% 74.8% 29.1%
31 2016 50/50 23.2 2.7 69.2% 82.4% 55.3% 68.3% 35.9% 73.9% 30.7% 2010 25/25 18.9 2.1 64.2% 83.5% 51.8% 68.0% 27.1% 72.1% 30.3%
32 2017 57/57 19.7 2.2 70.6% 80.6% 56.5% 63.6% 41.2% 73.5% 29.1% 2011 36/36 17.6 2.7 66.4% 80.8% 49.8% 65.5% 37.0% 70.5% 28.4%
33 2018 54/54 22.4 2.4 69.1% 81.3% 56.7% 70.1% 30.6% 73.7% 29.7% 2012 30/30 16.9 2.9 64.7% 79.5% 52.3% 61.0% 31.2% 69.7% 30.5%
34 2019 46/46 21.8 1.7 71.0% 81.4% 58.6% 70.1% 34.2% 74.7% 29.8% 2013 28/28 17.3 3.4 64.1% 82.1% 55.1% 61.7% 28.7% 72.4% 27.8%
35 2020 17/17 21.9 3.5 71.5% 78.6% 54.9% 84.1% 25.0% 72.2% 28.8% 2014 64/64 18.5 2.8 66.3% 82.8% 54.0% 68.7% 34.9% 73.2% 27.5%
36 2021 33/34 20.6 2.1 68.5% 79.0% 55.9% 62.7% 34.5% 71.8% 28.4% 2015 63/63 23.0 3.6 66.4% 84.9% 57.0% 73.1% 33.3% 75.5% 29.0%
37 2022 37/38 22.6 2.8 68.8% 80.3% 54.1% 64.9% 36.6% 72.1% 27.7% 2016 54/54 20.9 5.2 63.8% 81.7% 56.4% 72.1% 35.7% 72.6% 26.9%
38 2023 23/23 20.9 2.9 67.7% 79.7% 57.4% 72.2% 18.8% 72.3% 28.0% 2017 35/35 20.8 5.1 65.1% 81.8% 56.2% 67.0% 29.2% 72.7% 25.9%
39 — —/— — — — — — — — — — 2018 27/27 23.5 5.9 65.1% 83.9% 54.4% 71.8% 28.8% 73.4% 25.9%
40 — —/— — — — — — — — — — 2019 26/26 23.7 4.3 65.0% 83.3% 54.3% 72.4% 24.8% 73.2% 25.6%
41 — —/— — — — — — — — — — 2020 5/5 13.4 3.6 66.8% 75.6% 56.8% 71.8% 21.3% 69.5% 24.7%
42 — —/— — — — — — — — — — 2021 6/6 18.2 5.2 64.8% 79.3% 46.0% 44.2% 29.2% 67.6% 27.1%
Career — 756/764 18.8 2.3 68.9% 79.2% 56.7% 68.4% 33.7% 72.2% 29.8% — 692/698 19.8 3.5 65.3% 82.6% 53.8% 68.2% 32.4% 72.6% 28.1%

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 Ivo Karlovic
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
21 — — — — — — — — — — — — — — — — 2000 1493 98.8 — — — — — — — — — — — — —
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 2001 1501 100.2 -4.08 -1.53 0.943 47.8% — — — 0.0% -2.00 — 0–1 — +0.14
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 2002 1455 101.0 -0.82 -1.26 0.701 45.7% — — — 42.9% -0.57 0–1 1–1 — -0.01
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 2003 1666 123.8 +5.40 -4.66 1.033 50.5% -35 — +2 54.3% +0.22 2–2 (50%) 9–10 (47%) — -0.07
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 2004 1686 136.3 +5.37 -7.05 0.904 48.9% -54 -121 +84 45.1% -0.31 10–14 (42%) 28–28 (50%) — -0.85
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 2005 1745 141.3 +6.26 -7.68 0.875 48.7% -20 -269 +91 45.4% -0.26 6–7 (46%) 24–22 (52%) — -2.07
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 2006 1633 131.3 +6.13 -7.11 0.960 49.6% +16 -48 — 51.1% +0.03 7–9 (44%) 19–18 (51%) — +0.32
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 2007 1931 150.5 +9.95 -5.32 1.173 51.8% -6 -289 -103 60.5% +0.53 17–8 (68%) 37–30 (55%) — -1.29
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 2008 1815 150.1 +7.57 -4.88 1.069 50.7% +25 -181 +93 53.4% +0.24 7–10 (41%) 26–29 (47%) — +0.70
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 2009 1798 147.0 +8.98 -4.91 1.158 51.5% -104 -119 +253 51.8% +0.26 4–9 (31%) 14–24 (37%) — 0.00
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 2010 1867 147.8 +6.46 -3.55 1.087 51.1% -26 -171 — 56.7% +0.33 4–0 (100%) 11–9 (55%) — -0.09
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 2011 1822 147.5 +6.44 -5.95 0.962 49.6% +14 -88 +122 46.5% -0.14 5–5 (50%) 19–19 (50%) — -1.25
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 2012 1769 144.3 +5.38 -4.85 1.007 49.8% +37 -113 +182 48.7% -0.18 2–6 (25%) 17–14 (55%) — -0.59
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 2013 1774 137.0 +5.97 -5.23 1.007 50.0% +27 — +167 51.6% +0.06 6–4 (60%) 17–11 (61%) — +0.66
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 2014 1857 153.7 +7.97 -6.74 1.029 49.9% +21 -115 +54 55.0% +0.13 11–8 (58%) 34–31 (52%) — +1.55
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 2015 1917 155.1 +10.01 -5.54 1.186 51.7% -35 -231 +136 57.1% +0.52 15–12 (56%) 32–44 (42%) — +3.02
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 2016 1973 155.0 +7.27 -7.09 0.983 50.0% -18 -250 +83 56.8% +0.16 12–6 (67%) 41–25 (62%) — +3.08
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 2017 1771 141.4 +6.85 -7.48 0.952 49.6% +15 -53 +153 44.9% -0.17 6–5 (55%) 17–24 (41%) — +1.27
39 — — — — — — — — — — — — — — — — 2018 1646 126.4 +5.95 -7.94 0.974 49.6% +41 +26 +201 46.2% -0.10 5–9 (36%) 17–24 (41%) — +0.79
40 — — — — — — — — — — — — — — — — 2019 1675 134.3 +6.12 -7.61 0.954 49.4% +46 -25 +100 49.3% -0.17 2–6 (25%) 20–18 (53%) — +1.01
41 — — — — — — — — — — — — — — — — 2020 1621 114.5 +1.55 -3.38 0.808 46.4% +33 — — 28.6% -1.00 — 1–4 (20%) — -0.32
42 — — — — — — — — — — — — — — — — 2021 1626 114.4 +1.80 -4.17 0.837 47.4% +19 — — 31.3% -0.75 2–1 (67%) 0–3 (0%) — +0.12
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 — 2000 150.3 +7.24 -6.06 1.023 50.2% -4 -133 +101 51.7% +0.09 123–122 (50%) 384–389 (50%) 100.0 +0.88

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.