Stadium: Court 5 N Round: 26 Ground: Hardcourt outdoor
| ITF M15 Champaign | 2021/06/23 19:10 | Vasil Kirkov v Kyle Seelig | 6-4,3-6,6-7 |
| ITF M15 Champaign | 2021/06/22 15:00 | Kyle Seelig v Jose Pereira | 7-6,7-6 |
| ITF M15 Champaign | 2021/06/21 15:00 | Kyle Seelig v Cleeve Harper | 6-2,6-1 |
| ITF M25 Santo Domingo | 2021/06/09 14:55 | Kyle Seelig v Conner Huertas Del Pino | 6-3,2-6,2-6 |
| ITF M25 Santo Domingo | 2021/06/08 14:20 | Kyle Seelig v Sebastian Eguez | 6-3,6-2 |
| ITF M25 Santo Domingo | 2021/06/06 13:00 | Kyle Seelig v Aydan Gomez Osorio | 6-0,6-0 |
| ITF M25 Santo Domingo | 2021/06/04 13:00 | Aidan Mchugh v Kyle Seelig | 6-4,6-2 |
| ITF M25 Santo Domingo | 2021/06/03 15:55 | Kyle Seelig v Diego Hidalgo | 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 |
| ATP Santiago | 2021/03/07 16:20 | Nicolas Kicker v Thomaz Bellucci | 6-0,6-4 |
| ATP Santiago | 2021/03/06 17:20 | Elliot Benchetrit v Thomaz Bellucci | 2-6,2-6 |