Munich 
Bucharest 
Barcelona 
Rouen 
Oeiras 
San Miguel de Tucuman 
Gwangju Challenger 
Davis Сup Group I Tennis. Played Karlovic Ivo. Season 2021
Country 
Croatia. Ranking ATP 0.
Croatia. Ranking ATP 0. ATP - Pacific Life Open | ||||
|---|---|---|---|---|
| 06.10.2021 | Qialification final | Gomez Emilio — Karlovic Ivo | 2:0 (6:3, 7:6) |
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| 05.10.2021 | Qualifications - 1st round | Schnur Brayden — Karlovic Ivo | 1:2 (6:4, 6:7, 6:7) |
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| ATP - US Open | ||||
| 30.08.2021 | First round | Rublev Andrey — Karlovic Ivo | 3:0 (6:3, 7:6, 6:3) |
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| 27.08.2021 | Qialification final | Sugita Yuichi — Karlovic Ivo | 0:2 (3:6, 6:7) |
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| 27.08.2021 | Qualifications - 2nd round | Karlovic Ivo — Dellien Hugo | 2:1 (7:5, 6:7, 6:2) |
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| 25.08.2021 | Qualifications - 1st round | Karlovic Ivo — Milojevic Nikola | 2:0 (6:4, 7:6) |
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| ATP - Legg Masson Tennis Classic | ||||
| 31.07.2021 | Qualifications - 1st round | Karlovic Ivo — Marchenko Illya | 1:2 (3:6, 7:6, 3:6) |
|
 ATP - Los Cabos | ||||
| 21.07.2021 | First round | Thompson Jordan — Karlovic Ivo | 2:0 (6:4, 7:5) |
|
| ATP - Campbell`s Hall of Fame Tennis Championship | ||||
| 14.07.2021 | Second round | Bublik Alexander — Karlovic Ivo | 2:1 (7:6, 4:6, 6:1) |
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| 13.07.2021 | First round | Karlovic Ivo — Zapata Miralles Bernabe | 2:1 (6:7, 6:1, 6:4) |
|
 ATP - Wimbledon | ||||
| 22.06.2021 | Qualifications - 1st round | Safiullin Roman — Karlovic Ivo | 2:0 (6:3, 6:4) |
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| Tallahassee | ||||
| 20.04.2021 | First round | Karlovic Ivo — Fratangelo Bjorn | 1:2 (6:7, 7:6, 6:7) |
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| ATP - NASDAQ-100 | ||||
| 23.03.2021 | Qialification final | Mcdonald Mackenzie — Karlovic Ivo | 2:0 (7:6, 6:4) |
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| 22.03.2021 | Qualifications - 1st round | Karlovic Ivo — Ito Tatsuma | 2:0 (6:3, 7:6) |
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| ATP - Delray Beach International Tennis Championships | ||||
| 11.01.2021 | Second round | Quiroz Roberto — Karlovic Ivo | 2:0 (6:2, 6:4) |
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| 09.01.2021 | First round | Karlovic Ivo — Andujar Pablo | 2:1 (6:3, 5:7, 6:4) |
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