Stadium: Court 10 Round: 25 Ground: Clay
| ITF M25 Lima | 2021/10/04 16:10 | Vallebuona, Duilio v Jorge Jorge | 6-1,6-0 |
| UTR Pro Tennis Series Florida | 2021/08/29 12:00 | Theo Winegar v Vallebuona, Duilio | 3-6,5-7 |
| UTR Pro Tennis Series Florida | 2021/08/28 15:00 | Vallebuona, Duilio v Mora, Daniel | 6-3,1-1 |
| UTR Pro Tennis Series Florida | 2021/08/26 16:30 | Vallebuona, Duilio v van Emburgh, Jake | 4-6,6-4,3-5 |
| UTR Pro Tennis Series Florida | 2021/08/25 15:00 | Brian Berdusco v Vallebuona, Duilio | 6-3,6-4 |
| UTR Pro Tennis Series Florida | 2021/08/24 12:00 | Boyer, Toby D v Vallebuona, Duilio | 6-2,7-6 |
| UTR Pro Tennis Series Florida | 2021/08/20 16:00 | Vallebuona, Duilio v Panta Herreros, Jorge Brian | 4-6,1-6 |
| UTR Pro Tennis Series Florida | 2021/08/19 12:00 | Vallebuona, Duilio v Juan David Velasquez | 4-6,6-1,5-7 |
| ITF M15 Cancun | 2021/09/23 14:00 | Federico Agustin Gomez v Murkel Dellien | 6-0,6-3 |
| ITF M15 Cancun | 2021/09/22 14:00 | Murkel Dellien v Moceanu, Nikolas | 6-3,6-3 |
| Coupe Davis | 2021/09/19 19:45 | Murkel Dellien v Bemelmans, Ruben | 6-7,2-6 |
| Coupe Davis | 2021/09/18 16:35 | Murkel Dellien v Zizou Bergs | 6-4,4-6,6-2 |
| ITF M15 Ibague | 2021/09/07 19:45 | Murkel Dellien v Lopez Villasenor, Gerardo | 4-6,6-7 |
| Weston, FL, Singles M-ITF-USA-05A | 2021/07/03 00:00 | Murkel Dellien v Strong Kirchheimer | 6-7,6-7 |
| Weston, FL, Singles M-ITF-USA-05A | 2021/07/02 15:35 | Murkel Dellien v Rodriguez-Pace, Ricardo | 7-6,6-1 |
| ITF M25 Weston | 2021/06/29 22:45 | Alex Hernandez v Murkel Dellien | 1-6,6-1,9-11 |