Stadium: Pista 2 Round: 25 Ground: Hardcourt outdoor
| Challenger - Todi | 2021/07/13 19:35 | Tomas Martin Etcheverry v Matteo Viola | 6-4,7-6 |
| Challenger - Salzburg | 2021/07/06 09:00 | Matteo Viola v Carlos Taberner | 4-6,4-6 |
| Challenger - Porto | 2021/06/30 13:45 | Matteo Viola v Sergiy Stakhovsky | 2-6,6-4,5-7 |
| ATP - Mallorca | 2021/06/19 16:30 | Matteo Viola v Joao Sousa | 4-6,4-6 |
| Challenger - Aix en Provence | 2021/06/15 16:25 | Elias Ymer v Matteo Viola | 6-4,7-6 |
| Challenger - Nottingham | 2021/06/06 18:30 | Igor Sijsling v Matteo Viola | 6-7,6-1,6-0 |
| 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 - Amersfoort | 2021/07/13 10:30 | Thomaz Bellucci v Facundo Mena | 3-6,4-6 |
| ITF - M15 Champaign | 2021/06/24 14:55 | Kyle Seelig v Thomaz Bellucci | 2-6,6-2,6-4 |
| ITF - M15 Champaign | 2021/06/23 21:50 | Roy Smith v Thomaz Bellucci | 6-7,3-6 |
| ITF M25 - Tulsa | 2021/06/16 00:45 | Genaro Alberto Olivieri v Thomaz Bellucci | 6-3,7-5 |
| Challenger - Ostrava | 2021/04/25 12:40 | Oscar Otte v Thomaz Bellucci | 6-4,6-3 |
| Challenger - Tallahassee | 2021/04/19 18:35 | Mikael Torpegaard v Thomaz Bellucci | 7-6,7-5 |
| Challenger - Orlando | 2021/04/12 14:00 | JC Aragone v Thomaz Bellucci | 6-3,7-6 |
| Challenger - Santiago | 2021/03/16 15:00 | Roberto Carballes Baena v Thomaz Bellucci | 2-6,6-2,7-6 |