Stadium: COURT 1 Round: 25 Ground: Hardcourt outdoor
| Challenger Fairfield | 2018/10/11 20:00 | Adrian Menendez-Maceiras v Thiemo De Bakker | 6-4,6-3 |
| Challenger Fairfield | 2018/10/09 23:05 | Henri Laaksonen v Thiemo De Bakker | 6-4,4-6,1-6 |
| Challenger Monterrey | 2018/10/02 00:15 | Ivo Karlovic v Thiemo De Bakker | 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 Orlando | 2018/12/31 23:30 | Laurynas Grigelis v Ulises Blanch | 1-6,2-6 |
| Challenger Buenos Aires | 2018/11/11 22:00 | Ulises Blanch v Bastian Malla | 3-6,4-6 |
| Challenger Montevideo | 2018/11/05 17:45 | Juan Ignacio Galarza v Ulises Blanch | 6-3,2-6,6-4 |
| Challenger Montevideo | 2018/11/04 14:45 | Tomas Lipovsek Puches v Ulises Blanch | 3-6,2-6 |
| Challenger Montevideo | 2018/11/03 17:30 | Emiliano Troche v Ulises Blanch | 4-6,2-6 |
| Challenger Guayaquil | 2018/10/31 16:00 | Ulises Blanch v Facundo Arguello | 4-6,1-6 |
| Challenger Guayaquil | 2018/10/30 19:20 | Ulises Blanch v Facundo Bagnis | 7-5,6-4 |
| Challenger Guayaquil | 2018/10/29 15:30 | Martin Cuevas v Ulises Blanch | 6-2,6-3 |