Stadium: Yonex Court Round: 54 Ground: Clay
| Meerbusch, Allemagne, Qualifications | 2018/08/12 13:30 | Tristan Lamasine v Manuel Guinard | 6-4,6-4 |
| Meerbusch, Allemagne, Qualifications | 2018/08/11 13:05 | Tristan Lamasine v Gijs Brouwer | 6-2,4-6,6-1 |
| Sopot, Pologne | 2018/07/31 09:45 | Zdenek Kolar v Tristan Lamasine | 3-6,6-3,6-3 |
| Challenger Tampere | 2018/07/28 10:35 | Tallon Griekspoor v Tristan Lamasine | 6-4,7-5 |
| Challenger Tampere | 2018/07/27 12:00 | Tristan Lamasine v de Bakker, Thiemo | 7-6,6-1 |
| Challenger Tampere | 2018/07/25 10:00 | Baldi, Filippo v Tristan Lamasine | 4-6,5-7 |
| Challenger Tampere Qual | 2018/07/23 08:00 | Dimitar Kuzmanov v Tristan Lamasine | 6-7,6-3,4-6 |
| Challenger Tampere Qual | 2018/07/22 10:00 | Antoine Bellier v Tristan Lamasine | 3-6,2-6 |
| Meerbusch, Allemagne, Qualifications | 2018/08/12 09:40 | Sieber, Marc v Adrian Oetzbach | 6-0,6-0 |
| Meerbusch, Allemagne, Qualifications | 2018/08/11 11:45 | Mats Rosenkranz v Sieber, Marc | 3-6,3-6 |
| Challenger Pullach Qual | 2018/08/04 09:00 | Sieber, Marc v Lenz, Julian | 4-6,6-4,4-6 |
| Challenger Liberec Qual | 2018/07/29 08:30 | Sieber, Marc v Marvin Moeller | 2-6,5-7 |
| Challenger Liberec Qual | 2018/07/28 08:00 | Juan Pablo Ficovich v Sieber, Marc | 3-6,6-3,3-6 |
| Challenger Prague | 2018/07/24 11:30 | Nedovyesov, Aleksandr v Sieber, Marc | 6-0,6-4 |
| Challenger Prague Qual | 2018/07/23 10:10 | Torebko, Peter v Sieber, Marc | 1-6,4-6 |
| Challenger Prague Qual | 2018/07/22 14:10 | Dominik Kellovsky v Sieber, Marc | 3-6,6-7 |