Stadium: Court 4 Round: 44
| ITF Egypt F22 | 2018/10/07 08:00 | Andrea Borroni v Kevin Portmann | 6-3,6-3 |
| ITF Egypt F22 | 2018/10/06 10:30 | Kevin Portmann v Shane Biddaiah | 7-6,6-4 |
| ITF Egypt F21 | 2018/09/30 10:00 | Daniil Glinka v Kevin Portmann | 6-0,7-5 |
| ITF France F19 Qual | 2018/09/22 12:40 | Paul-Georg Guenther v Kevin Portmann | 6-3,6-0 |
| ITF Canada F7 | 2018/09/08 15:00 | Philip Wilbert Major v Kevin Portmann | 6-2,7-5 |
| ITF Canada F6 | 2018/09/01 13:00 | Kevin Portmann v Gabriel Diallo | 3-6,3-6 |
| ITF Georgia F2 | 2018/07/15 08:00 | Vladislav Melnic v Kevin Portmann | 6-1,6-2 |
| ITF Tunisia F25 | 2018/06/23 14:00 | Kevin Portmann v Razvan M Codescu | 1-6,1-6 |
| ITF Egypt F22 | 2018/10/06 08:00 | Yohei Otsuka v Patrick Foley | 1-6,6-3,4-6 |
| ITF Spain F29 | 2018/09/22 09:30 | Yohei Otsuka v Nikita Tatyanin | 6-7,5-7 |
| ITF Tunisia F29 | 2018/08/27 09:30 | Max Flaherty v Yohei Otsuka | 6-3,7-5 |
| ITF Spain F24 | 2018/08/18 09:00 | Carles A Talaya v Yohei Otsuka | 6-2,6-1 |
| ITF Spain F23 | 2018/08/12 10:00 | Yohei Otsuka v Pol Fernandez | 3-6,6-7 |
| ITF Spain F23 | 2018/08/11 11:30 | Yohei Otsuka v Tommaso Spelta | 6-1,6-1 |
| ITF Spain F21 Qual | 2018/07/28 07:00 | Yohei Otsuka v Ernesto T Julian | 2-6,2-6 |
| ITF Georgia F2 | 2018/07/14 05:00 | Yohei Otsuka v Roman Blokhin | 4-6,6-1,4-6 |