Stadium: Estadio Round: 26 Ground: Hardcourt outdoor
| Challenger Monterrey | 2018/10/02 00:15 | Ivo Karlovic v Thiemo De Bakker | 7-6,7-5 |
| US Open | 2018/08/23 21:30 | Collin Altamirano v Ivo Karlovic | 7-5,6-4 |
| 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 |
| Challenger Monterrey | 2018/10/01 21:25 | Stefan Kozlov v Lucas Gomez | 2-6,4-6 |
| ITF USA F26 | 2018/09/28 18:55 | Michael Shabaz v Lucas Gomez | 6-1,6-3 |
| ITF USA F26 | 2018/09/27 20:20 | Govind Nanda v Lucas Gomez | 4-6,6-3,3-6 |
| ITF USA F26 | 2018/09/26 17:00 | Conor Berg v Lucas Gomez | 6-4,6-7,1-6 |
| Davis Cup | 2018/09/15 15:55 | Martin Cuevas v Lucas Gomez | 6-4,6-3 |
| ITF Switzerland F5 | 2018/09/05 10:00 | Louis Wessels v Lucas Gomez | 6-2,3-6,6-4 |
| ITF Switzerland F5 | 2018/09/03 12:00 | Raphael Baltensperger v Lucas Gomez | 6-1,2-6,2-6 |
| ITF Switzerland F4 | 2018/08/30 12:45 | Peter Heller v Lucas Gomez | 6-3,6-4 |