Stadion: Court 6 Round: 25 Ground: Clay
| 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 - Trimbach | 2021/03/10 12:00 | Yann Marti v Luca Staeheli | 6-2,6-3 |
| ITF - M25 - Trimbach | 2021/03/09 10:30 | Yann Marti v Lewie Lane | 6-2,6-2 |
| ITF - M25 - Trimbach | 2021/03/08 11:25 | Yann Marti v Raffaele Mariani | 6-1,6-4 |
| ITF - M15 - Sibenik | 2021/05/17 11:00 | Jan Kupcic v Taiyo Yamanaka | 5-7,6-0,4-10 |
| ITF - M15 - Valldoreix | 2021/05/09 14:00 | Taiyo Yamanaka v Xavi Matas Ortega | 5-7,6-4,4-10 |
| ITF - M15 - Majadahonda | 2021/05/03 12:00 | Luis Faria v Taiyo Yamanaka | 6-4,5-7,10-7 |
| ITF - M15 - Majadahonda | 2021/05/02 16:15 | Taiyo Yamanaka v Guy Den Heijer | 6-7,6-3,11-9 |
| ITF - M15 - Antalya | 2021/04/26 07:00 | Taiyo Yamanaka v Dan Alexandru Tomescu | 4-6,2-6 |
| ITF - M15 - Antalya | 2021/04/25 07:00 | Taiyo Yamanaka v Michel Hopp | 6-3,6-4 |
| ITF - M15 - Antalya | 2021/04/18 07:00 | Taiyo Yamanaka v Keisuke Saitoh | 4-6,1-6 |
| ITF - M15 - Antalya | 2021/04/13 08:15 | Taiyo Yamanaka v Antonio Massara | 2-6,6-4,12-14 |