| ATP Indian Wells | 03/11 19:45 | 25 | [89] Ivo Karlovic v Prajnesh Gunneswaran [97] | 6-3,7-6 | |
| ATP Indian Wells | 03/09 20:45 | 24 | [12] Borna Coric v Ivo Karlovic [89] | 4-6,6-7 | |
| ATP Indian Wells | 03/07 20:40 | 23 | [89] Ivo Karlovic v Matthew Ebden [49] | 7-6,7-6 | |
| ATP Delray Beach | 02/19 16:00 | 25 | [82] Radu Albot v Ivo Karlovic [88] | 7-6,6-4 | |
| ATP New York | 02/13 16:00 | 25 | [81] Ivo Karlovic v Radu Albot [79] | 7-6,6-7,6-7 | |
| ATP Montpellier | 02/04 15:00 | 25 | [111] Marcel Granollers v Ivo Karlovic [78] | 7-6,6-7,7-6 | |
| Ausztrál Open | 01/17 00:00 | 24 | [73] Ivo Karlovic v Kei Nishikori [9] | 3-6,6-7,7-5,7-5,6-7 | |
| Ausztrál Open | 01/15 00:00 | 23 | [73] Ivo Karlovic v Hubert Hurkacz [76] | 6-7,7-6,7-6,7-6 | |
| ATP Pune | 01/05 11:30 | 29 | [6] Kevin Anderson v Ivo Karlovic [100] | 7-6,6-7,7-6 | |
| ATP Pune | 01/04 13:30 | 28 | Steve Darcis v Ivo Karlovic | 6-7,6-4,3-6 | |
| ATP Pune | 01/03 09:30 | 27 | [100] Ivo Karlovic v Ernests Gulbis [95] | 7-6,7-6 | |
| ATP Pune | 01/02 09:30 | 26 | [97] Evgeny Donskoy v Ivo Karlovic [100] | 4-6,5-7 | |
| ATP Pune | 01/01 09:30 | 25 | [108] Felix Auger Aliassime v Ivo Karlovic [100] | 4-6,5-7 | |
| Challenger Houston | 11/16 17:30 | 27 | [171] Dominik Koepfer v Ivo Karlovic [102] | 6-1,6-4 | |
| Challenger Houston | 11/14 19:00 | 26 | [331] Emilio Gomez v Ivo Karlovic [102] | 6-7,3-6 | |
| Challenger Houston | 11/13 16:00 | 25 | [360] Marcos Giron v Ivo Karlovic [102] | 4-6,2-6 | |
| Challenger Charlottesville | 11/02 22:10 | 27 | [107] Ivo Karlovic v Tommy Paul [277] | 6-7,4-6 | |
| Challenger Charlottesville | 11/01 23:45 | 26 | [107] Ivo Karlovic v Marcos Giron [373] | 7-6,6-3 | |
| Challenger Charlottesville | 10/30 22:45 | 25 | [107] Ivo Karlovic v Mitchell Krueger [250] | 7-5,4-6,6-3 | |
| Challenger Calgary | 10/21 19:00 | 29 | [108] Jordan Thompson v Ivo Karlovic [121] | 6-7,3-6 | |
| Challenger Calgary | 10/20 19:25 | 28 | Borna Gojo v Ivo Karlovic | 6-7,6-7 | |
| Challenger Calgary | 10/19 19:30 | 27 | [185] Roberto Quiroz v Ivo Karlovic [121] | 6-7,6-4,6-7 | |
| Challenger Calgary | 10/18 19:55 | 26 | [299] Mathias Bourgue v Ivo Karlovic [121] | 6-7,6-4,3-6 | |
| Challenger Calgary | 10/17 01:55 | 25 | [276] Evan King v Ivo Karlovic [121] | 6-7,7-6,6-7 | |
| Challenger Fairfield | 10/10 03:35 | 25 | [180] Dominik Koepfer v Ivo Karlovic [117] | 6-4,6-4 | |
| Challenger Monterrey | 10/07 21:00 | 29 | [147] David Ferrer v Ivo Karlovic [137] | 6-3,6-4 | |
| Challenger Monterrey | 10/06 19:00 | 28 | [137] Ivo Karlovic v Santiago Giraldo [412] | 6-7,6-4,7-6 | |
| Challenger Monterrey | 10/05 22:40 | 27 | [137] Ivo Karlovic v Bjorn Fratangelo [169] | 6-4,6-3 | |
| Challenger Monterrey | 10/04 00:35 | 26 | Ivo Karlovic v Lucas Gomez | 3-6,6-3,7-6 | |
| Challenger Monterrey | 10/02 00:15 | 25 | [137] Ivo Karlovic v Thiemo De Bakker [233] | 7-6,7-5 |