Stadium: Stadium 8 Round: 19 Ground: Hardcourt outdoor
| Challenger Noumea | 2020/01/10 00:00 | Roberto Marcora v Matteo Viola | 6-7,6-7 |
| Challenger Bratislava | 2019/11/04 12:10 | Roberto Marcora v Matteo Viola | 3-6,6-3,7-6 |
| Challenger Biella | 2021/05/31 11:55 | Roberto Marcora v Felipe Meligeni Rodrigues Alves | 3-6,1-6 |
| French Open | 2021/05/25 17:30 | Roberto Marcora v Sumit Nagal | 3-6,3-6 |
| ATP Lyon | 2021/05/16 16:25 | Joao Sousa v Roberto Marcora | 6-3,6-4 |
| Challenger Prague | 2021/05/04 08:30 | Roberto Marcora v Marc Polmans | 6-7,2-6 |
| Challenger Rome | 2021/04/29 11:15 | Nino Serdarusic v Roberto Marcora | 4-6,6-1,6-4 |
| Challenger Rome | 2021/04/27 14:00 | Aleksandar Vukic v Roberto Marcora | 4-6,1-6 |
| Challenger Rome | 2021/04/21 10:30 | Roberto Marcora v Juan Pablo Varillas | 3-6,0-6 |
| Challenger Rome | 2021/04/20 10:20 | Borna Gojo v Roberto Marcora | 2-6,3-6 |
| ATP Parma | 2021/05/23 12:55 | Mikael Ymer v Matteo Viola | 6-4,3-6,6-0 |
| ATP Parma | 2021/05/22 12:50 | Evgeny Karlovskiy v Matteo Viola | 5-7,7-5,5-7 |
| Challenger Biella | 2021/05/17 14:55 | Matteo Viola v Alexandre Muller | 6-4,3-6,1-6 |
| Challenger Zagreb | 2021/05/09 11:10 | Emilio Gomez v Matteo Viola | 7-5,6-7,6-1 |
| Challenger Biella | 2021/05/03 08:30 | Maximilian Marterer v Matteo Viola | 6-3,7-5 |
| Challenger Rome | 2021/04/18 13:25 | Matteo Viola v Alexey Vatutin | 3-6,7-6,1-6 |
| Challenger Split | 2021/04/12 08:30 | Zdenek Kolar v Matteo Viola | 6-2,6-4 |
| Challenger Split Qual | 2021/04/11 09:00 | Evgeny Karlovskiy v Matteo Viola | 2-6,2-6 |