Stadium: Court 8 Round: 62 Ground: Hardcourt outdoor
| ITF - M15 Monastir | 2021/08/05 07:30 | Hady Habib v Martniez, Mateo Nicolas | 7-6,5-7,6-4 |
| ITF - M15 Monastir | 2021/08/04 07:30 | Martniez, Mateo Nicolas v Dimitrov, Martin | 6-2,6-2 |
| ITF - M15 Monastir | 2021/08/03 07:30 | Jan Sebesta v Martniez, Mateo Nicolas | 2-6,1-6 |
| ITF - M15 Monastir | 2021/08/02 07:30 | Martniez, Mateo Nicolas v Joshua Sheehy | 6-3,6-4 |
| ITF - M15 Monastir | 2021/08/01 10:00 | Martniez, Mateo Nicolas v Alec Deckers | 6-7,7-5,10-7 |
| ITF - M15 Villa Maria | 2021/03/29 12:30 | Franco Emanuel Egea v Martniez, Mateo Nicolas | 3-6,6-2,10-5 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/06/02 09:00 | Martniez, Mateo Nicolas v Genaro Alberto Olivieri | 6-2,6-2 |
| Tabarka, Singles Qualifying M-ITF-TUN-41A | 2019/06/01 09:00 | Martniez, Mateo Nicolas v Pedro Vives Marcos | 6-3,6-2 |
| ITF - M15 Monastir | 2021/08/02 07:30 | Paris, Joshua v Vasiliauskas, Matas | 6-3,6-4 |
| ITF - M15 Monastir | 2021/08/01 09:00 | Eisa-Beygi, Masood v Vasiliauskas, Matas | 0-6,0-6 |
| ITF - M15 Monastir | 2021/07/25 08:00 | Novikov, Egor v Vasiliauskas, Matas | 6-4,6-3 |
| ITF - M15 Monastir | 2021/07/18 13:00 | Abderrahman, Wissam v Vasiliauskas, Matas | 6-3,6-4 |
| ITF - M15 Monastir | 2021/07/11 10:00 | Nicolas Hollender v Vasiliauskas, Matas | 6-2,6-7,11-9 |
| ITF - M15 Héraklion | 2021/06/10 09:15 | Vasiliauskas, Matas v Billy Harris | 3-6,6-3,1-6 |
| ITF - M15 Héraklion | 2021/06/09 14:00 | Vasiliauskas, Matas v Runhao Hua | 6-4,7-6 |
| ITF - M15 Héraklion | 2021/06/07 06:30 | Vasiliauskas, Matas v Goldenberg, Lior | 7-5,6-4 |