Stadium: Court 12 Round: 25 Ground: Clay
| ATP Madrid Qual | 2018/05/05 09:00 | Delbonis, Federico v Semmler, Miguel | 6-4,6-1 |
| ITF Spain F10 | 2018/04/24 11:00 | Pedro Cachin v Semmler, Miguel | 6-1,6-4 |
| ITF Spain F9 | 2018/04/19 12:20 | Raul Brancaccio v Semmler, Miguel | 6-3,6-1 |
| ITF Spain F9 | 2018/04/17 09:50 | Semmler, Miguel v Nikolas Sanchez Izquierdo | 6-4,7-6 |
| Challenger Barletta Qual | 2018/04/07 08:00 | Semmler, Miguel v Haider-Maurer, Andreas | 4-6,5-7 |
| Challenger Alicante Qual | 2018/03/31 08:30 | Semmler, Miguel v Vilella Martinez, Mario | 2-6,1-6 |
| Challenger Marbella Qual | 2018/03/24 10:00 | Semmler, Miguel v Donati, Matteo | 4-6,4-6 |
| ITF Spain F7 | 2018/03/20 10:25 | Semmler, Miguel v Javier Barranco Cosano | 3-6,6-7 |
| Challenger Lyon Qual | 2018/06/10 12:05 | Samper-Montana, Jordi v Matteo Martineau | 5-7,7-6,6-4 |
| Challenger Lyon Qual | 2018/06/09 14:00 | Matteo Martineau v Heliovaara, Harri | 6-4,6-1 |
| Tunisia F22, Singles Qualifying | 2018/06/07 11:35 | Matteo Martineau v Andrey Chepelev | 4-6,5-7 |
| Tunisia F22, Singles Qualifying | 2018/06/05 10:30 | Matteo Martineau v Trapani, Andrea | 6-2,6-1 |
| ATP Lyon Qual | 2018/05/20 08:30 | Samper-Montana, Jordi v Matteo Martineau | 6-3,4-6,6-3 |
| ATP Lyon Qual | 2018/05/19 08:30 | Matteo Martineau v Evgeny Karlovskiy | 6-3,3-6,6-3 |
| Challenger Bordeaux Qual | 2018/05/12 15:00 | Matteo Martineau v Elliot Benchetrit | 4-6,6-4,3-6 |
| ITF France F9 | 2018/05/01 11:00 | Faivre, Pierre v Matteo Martineau | 4-6,6-3,6-4 |