Stadium: Court 13 Round: 45 Ground: Hardcourt outdoor
| US Open | 2018/08/22 22:40 | Tomislav Brkic v Collin Altamirano | 2-6,0-6 |
| Challenger Lexington | 2018/08/01 15:10 | Joao Menezes v Collin Altamirano | 3-6,4-6 |
| Challenger Lexington | 2018/07/31 01:35 | Hugo Grenier v Collin Altamirano | 7-6,6-7,4-6 |
| ITF USA F19B | 2018/07/21 15:30 | Evgeny Karlovskiy v Collin Altamirano | 6-4,6-4 |
| ITF USA F19B | 2018/07/20 16:00 | Collin Altamirano v Kareem Allaf | 6-4,6-2 |
| ITF USA F19B | 2018/07/19 20:50 | Collin Altamirano v Bernardo Saraiva | 6-3,6-4 |
| ITF USA F19B | 2018/07/17 15:00 | Collin Altamirano v Will Davies | 6-1,6-2 |
| Challenger Winnetka | 2018/07/13 19:20 | Jason Jung v Collin Altamirano | 6-2,6-2 |
| US Open | 2018/08/22 21:35 | Illya Marchenko v Ivo Karlovic | 3-6,6-7 |
| ATP Cincinnati Qual | 2018/08/12 18:40 | Hubert Hurkacz v Ivo Karlovic | 7-6,7-6 |
| ATP Cincinnati Qual | 2018/08/11 23:00 | Ivo Karlovic v Taro Daniel | 7-6,6-3 |
| ATP Los Cabos | 2018/07/31 04:15 | Ivo Karlovic v Elias Ymer | 4-6,3-6 |
| ATP Atlanta | 2018/07/23 23:00 | Ivo Karlovic v Donald Young | 6-2,6-7,6-7 |
| ATP Newport | 2018/07/18 17:45 | Dudi Sela v Ivo Karlovic | 7-6,6-7,6-2 |
| ATP Newport | 2018/07/17 19:10 | Ivo Karlovic v Alex De Minaur | 6-7,7-6,7-5 |
| Wimbledon | 2018/07/04 13:20 | Ivo Karlovic v Jan-Lennard Struff | 7-6,6-3,6-7,6-7,11-13 |