Stadium: Estadio Round: 25 Ground: Hardcourt outdoor
| 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 |
| ATP Newport | 2018/07/17 19:10 | Ivo Karlovic v Alex De Minaur | 6-7,7-6,7-5 |
| Challenger Tiburon | 2018/09/24 22:20 | Thiemo De Bakker v Noah Rubin | 0-6,0-6 |
| Davis Cup | 2018/09/14 20:00 | Milos Raonic v Thiemo De Bakker | 6-3,6-2,6-2 |
| US Open | 2018/08/21 18:50 | Thiemo De Bakker v JC Aragone | 4-6,7-6,6-7 |
| Challenger Sopot | 2018/08/03 10:30 | Pedro Cachin v Thiemo De Bakker | 6-3,3-6,6-2 |
| Challenger Sopot | 2018/08/01 10:45 | Gianluca Mager v Thiemo De Bakker | 4-6,1-6 |
| Challenger Sopot | 2018/07/31 08:00 | Thiemo De Bakker v Mats Moraing | 7-6,6-2 |
| Challenger Tampere | 2018/07/27 12:00 | Tristan Lamasine v Thiemo De Bakker | 7-6,6-1 |
| Challenger Tampere | 2018/07/25 16:00 | Thiemo De Bakker v Elliot Benchetrit | 6-4,3-6,6-1 |