H2H data updated: 2026-07-18 07:16 UTC
Martin Klizan vs John Isner H2H: 1-1
Martin Klizan and John Isner are tied 1–1 in their ATP head-to-head. Across 2 main-draw meetings, they are tied 1–1 on hard courts. Most recently, Martin Klizan won the 2014 Australian Open first round 6-2 7-6(6) RET.
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Slovakia
Age 37
Left-Handed
191 cm / 6'3"
H2H
1
–
1
2 main draw meetings
USA
Age 41
Right-Handed
208 cm / 6'10"
H2H Match Log
| Date | Tournament | Category | Round | Surface | Winner | Score | Loser | Match |
|---|---|---|---|---|---|---|---|---|
| Jan 15, 2014* | Australian Open | Grand Slam | R128 | Hard | Martin Klizan | 6-2 7-6(6) (ret.) | John Isner | Match data |
| Aug 22, 2012* | Winston-Salem | ATP 250 | R32 | Hard | John Isner | 4-6 6-3 7-5 | Martin Klizan | Match data |
* Estimated match date where the exact historical date is unavailable.
Career Comparison
| Player | Current | Peak | Pts | Elo | W | L | Win % | GS | 1000 | Finals | 500 | 250 | Titles |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Martin Klizan | #831 | #24 | 1,445 | 1,979 | 128 | 146 | 46.7% | 0 | 0 | 0 | 2 | 4 | 6 |
| John Isner | #660 | #8 | 3,720 | 2,053 | 467 | 293 | 61.4% | 0 | 1 | 0 | 0 | 15 | 16 |
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 | Martin Klizan | John Isner | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Yr | W-L | Win % | Rank | Elo | GS | Titles | Yr | W-L | Win % | Rank | Elo | GS | Titles | |
| 17 | 2007 | 1–1 | 50.0% | #395 | 1,524 | 0 | 0 | — | — | — | — | — | — | — |
| 19 | 2009 | 0–1 | 0.0% | #234 | 1,542 | 0 | 0 | — | — | — | — | — | — | — |
| 20 | 2010 | 1–2 | 33.3% | #155 | 1,607 | 0 | 0 | — | — | — | — | — | — | — |
| 21 | 2011 | 0–2 | 0.0% | #117 | 1,600 | 0 | 0 | — | — | — | — | — | — | — |
| 22 | 2012 | 16–13 | 55.2% | #30 | 1,795 | 0 | 1 | 2007 | 8–5 | 61.5% | #106 | 1,656 | 0 | 0 |
| 23 | 2013 | 12–24 | 33.3% | #108 | 1,690 | 0 | 1 | 2008 | 11–19 | 36.7% | #144 | 1,608 | 0 | 0 |
| 24 | 2014 | 23–16 | 59.0% | #34 | 1,899 | 0 | 2 | 2009 | 27–18 | 60.0% | #34 | 1,828 | 0 | 0 |
| 25 | 2015 | 24–27 | 47.1% | #43 | 1,794 | 0 | 3 | 2010 | 38–20 | 65.5% | #19 | 1,882 | 0 | 1 |
| 26 | 2016 | 14–15 | 48.3% | #35 | 1,750 | 0 | 5 | 2011 | 34–19 | 64.2% | #18 | 2,021 | 0 | 3 |
| 27 | 2017 | 10–15 | 40.0% | #141 | 1,755 | 0 | 5 | 2012 | 38–18 | 67.9% | #14 | 1,965 | 0 | 5 |
| 28 | 2018 | 18–9 | 66.7% | #41 | 1,917 | 0 | 6 | 2013 | 38–22 | 63.3% | #14 | 1,983 | 0 | 7 |
| 29 | 2019 | 9–18 | 33.3% | #141 | 1,703 | 0 | 6 | 2014 | 37–21 | 63.8% | #19 | 1,922 | 0 | 9 |
| 30 | 2020 | 0–2 | 0.0% | #151 | 1,649 | 0 | 6 | 2015 | 45–23 | 66.2% | #11 | 2,026 | 0 | 10 |
| 31 | — | — | — | — | — | — | — | 2016 | 30–20 | 60.0% | #19 | 2,019 | 0 | 10 |
| 32 | — | — | — | — | — | — | — | 2017 | 36–21 | 63.2% | #17 | 1,984 | 0 | 12 |
| 33 | — | — | — | — | — | — | — | 2018 | 32–22 | 59.3% | #10 | 1,956 | 0 | 14 |
| 34 | — | — | — | — | — | — | — | 2019 | 29–17 | 63.0% | #19 | 1,921 | 0 | 15 |
| 35 | 2025 | 0–1 | 0.0% | #835 | 1,556 | 0 | 6 | 2020 | 10–7 | 58.8% | #25 | 1,845 | 0 | 15 |
| 36 | — | — | — | — | — | — | — | 2021 | 23–11 | 67.6% | #24 | 1,933 | 0 | 16 |
| 37 | — | — | — | — | — | — | — | 2022 | 22–16 | 57.9% | #41 | 1,891 | 0 | 16 |
| 38 | — | — | — | — | — | — | — | 2023 | 9–14 | 39.1% | #172 | 1,698 | 0 | 16 |