Stadium: Pista 1 Round: 14 Ground: Hardcourt outdoor
| 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 |
| ATP Delray Beach | 2021/01/07 16:00 | Thomaz Bellucci v Thiago Monteiro | 3-6,5-7 |
| Challenger Campinas | 2020/12/02 21:15 | Thomaz Bellucci v Mohamed Safwat | 6-2,4-6,3-6 |
| ITF M25 Vic | 2021/05/16 07:00 | Vicente O Moratalla v Rafael Giotis | 6-3,6-4 |
| ITF M15 Valldoreix | 2021/05/09 13:00 | Francisco Cabral v Rafael Giotis | 7-5,6-0 |
| ITF M15 Las Palmas | 2021/04/26 10:30 | Inaki Cabrera Bello v Rafael Giotis | 6-3,6-4 |
| ITF M15 Las Palmas | 2021/04/25 14:30 | Rafael Giotis v Martin Breysach | 5-7,6-2,10-4 |
| ITF M25 Reus | 2021/04/11 07:00 | Kenny de Schepper v Rafael Giotis | 6-3,6-4 |
| ITF M15 Antalya | 2021/03/30 07:00 | Vlad Andrei Dancu v Rafael Giotis | 0-6,7-6,10-2 |
| ITF M15 Antalya | 2021/03/29 07:00 | Rafael Giotis v Arsenije Zlatanovic | 6-3,6-1 |
| ITF M15 Antalya | 2021/03/28 06:30 | Rafael Giotis v Carlo Alberto Fossati | 7-5,4-6,10-4 |