| Challenger Ochsenhausen | 2018/11/27 08:00 | Martinez, Guillermo v Sriram, Sushmit | W | 3-2 |
| Challenger Ochsenhausen | 2018/11/26 17:00 | Martinez, Guillermo v Miroslav Horejsi | L | 0-3 |
| Challenger Ochsenhausen | 2018/11/26 15:00 | Marius Henninger v Martinez, Guillermo | W | 1-3 |
| Challenger Ochsenhausen | 2018/11/26 10:10 | Martinez, Guillermo v Adrian Wiecek | L | 2-3 |
| Challenger Ochsenhausen | 2018/11/26 08:50 | Martinez, Guillermo v Enio Mendes | L | 1-3 |
| République tchèque - Extraleague | 2018/10/23 16:15 | Kashiwa, Takeru v Martinez, Guillermo | L | 4-3 |
| Challenger Ochsenhausen | 2018/10/09 11:40 | Tomas Konecny v Martinez, Guillermo | L | 3-0 |
| Challenger Ochsenhausen | 2018/10/09 07:40 | Andriy Sitak v Martinez, Guillermo | L | 3-1 |
| Challenger Ochsenhausen | 2018/11/27 08:40 | Karakasevic, Aleksandar v Miroslav Horejsi | L | 2-3 |
| Challenger Ochsenhausen | 2018/11/26 18:20 | Marius Henninger v Karakasevic, Aleksandar | W | 0-3 |
| Challenger Ochsenhausen | 2018/11/26 14:20 | Karakasevic, Aleksandar v Adrian Wiecek | L | 2-3 |
| Challenger Ochsenhausen | 2018/11/26 10:50 | Karakasevic, Aleksandar v Enio Mendes | L | 2-3 |
| Challenger Ochsenhausen | 2018/11/26 09:30 | Karakasevic, Aleksandar v Sriram, Sushmit | W | 3-0 |
| Qatar Open XD | 2018/11/20 19:26 | Samuel Walker v Karakasevic, Aleksandar | W | 2-3 |
| Challenger Ochsenhausen | 2018/10/05 12:05 | Karakasevic, Aleksandar v Gaston Alto | L | 1-3 |
| Challenger Ochsenhausen | 2018/10/05 10:30 | Haiqal, Muhamad Ashraf v Karakasevic, Aleksandar | W | 1-3 |