Stadium: Court 13 Round: 45 Ground: Hardcourt outdoor
| ITF USA F17 | 2018/06/26 19:00 | Collin Altamirano v Jeffrey John Wolf | 4-6,5-7 |
| ITF Singapore F2 | 2018/05/26 03:00 | Takuto Niki v Collin Altamirano | 6-7,3-6 |
| ITF Singapore F2 | 2018/05/25 03:00 | Kazuki Nishiwaki v Collin Altamirano | 7-5,2-6,3-6 |
| ITF Singapore F2 | 2018/05/24 03:00 | Collin Altamirano v Shintaro Imai | 6-2,6-2 |
| ITF Singapore F2 | 2018/05/23 02:00 | Collin Altamirano v Karunuday Singh | 6-2,6-3 |
| ITF Singapore F2 | 2018/05/22 02:00 | Collin Altamirano v Hong Kit Wong | 6-0,3-6,6-3 |
| ITF China F6 | 2018/05/16 02:00 | Patrik Niklas-Salminen v Collin Altamirano | 7-6,7-5 |
| ITF China F6 | 2018/05/14 04:35 | Francis Casey Alcantara v Collin Altamirano | 1-6,0-6 |
| Wimbledon | 2018/07/02 12:50 | Ivo Karlovic v Mikhail Youzhny | 4-6,7-5,7-6,6-3 |
| ATP Halle Qual | 2018/06/16 09:00 | Lukas Lacko v Ivo Karlovic | 7-6,7-6 |
| ATP Hertogenbosch | 2018/06/11 12:40 | Robin Haase v Ivo Karlovic | 7-6,6-7,6-3 |
| French Open | 2018/05/27 12:25 | Ivo Karlovic v Corentin Moutet | 6-7,2-6,6-7 |
| ATP Geneva | 2018/05/21 13:20 | Ivo Karlovic v Peter Gojowczyk | 6-7,6-4,6-7 |
| ATP Munich | 2018/05/01 11:00 | Philipp Kohlschreiber v Ivo Karlovic | 7-5,6-4 |
| ATP Barcelona | 2018/04/24 16:20 | Ivo Karlovic v Roberto Bautista-Agut | 7-6,2-6,4-6 |
| ATP Barcelona | 2018/04/23 13:45 | Tommy Robredo v Ivo Karlovic | 7-6,6-7,4-6 |