Stadium: Court 8 Round: 54 Ground: Clay
| ITF M25 Bourg-en-Bresse | 2021/06/27 09:20 | Yann Marti v Florent Casays | 6-3,6-2 |
| ITF M15 Sibenik | 2021/05/20 10:20 | Yann Marti v Fabian Marozsan | 1-6,3-6 |
| ITF M15 Sibenik | 2021/05/19 14:50 | Yann Marti v Taiyo Yamanaka | 6-3,6-4 |
| ITF M15 Sibenik | 2021/05/18 09:10 | Yan Sabanin v Yann Marti | 2-6,2-6 |
| ITF M15 Sibenik | 2021/05/17 13:15 | Bjorn Nareyka v Yann Marti | 2-6,3-6 |
| ITF M15 Troisdorf | 2021/05/09 13:00 | Yann Marti v Marvin Greven | 6-3,6-1 |
| ITF M25 Biel | 2021/03/30 11:55 | Otto Virtanen v Yann Marti | 6-3,6-3 |
| ITF M25 Biel | 2021/03/29 12:05 | Yann Marti v Marvin Moeller | 6-4,6-7,10-5 |
| ITF M25 Bourg-en-Bresse | 2021/06/27 09:40 | Theo Arribage v Maik Steiner | 2-6,6-2,8-10 |
| ITF M25 Klosters | 2021/06/20 07:00 | Gian Luca Tanner v Maik Steiner | 6-4,6-2 |
| ITF M15 Antalya | 2021/06/02 11:30 | Maik Steiner v Giacomo Dambrosi | 3-6,3-6 |
| ITF M15 Antalya | 2021/06/01 07:00 | Maik Steiner v Francisco Llanes | 7-5,6-4 |
| ITF M15 Antalya | 2021/05/31 09:30 | Maik Steiner v Federico Marchetti | 6-1,7-6 |
| ITF M15 Antalya | 2021/05/30 07:30 | Maik Steiner v Mirgiiaz Mirdzhaliev | 6-1,6-1 |
| ITF M15 Antalya | 2021/05/25 07:00 | Maik Steiner v Edouard Villoslada | 4-6,3-6 |
| ITF M15 Antalya | 2021/05/19 09:20 | Maik Steiner v Mariano Navone | 0-6,2-6 |