Stadium: Court 3 Round: 25 Ground: Clay
| ITF M15 Pescara | 2021/08/17 08:00 | Andrea Basso v Marcello Serafini | 2-6,6-4,1-6 |
| ITF M25 Bolzano | 2021/08/04 07:00 | Federico Arnaboldi v Andrea Basso | 6-4,6-0 |
| ITF M15 Perugia | 2021/07/25 09:30 | Andrea Basso v Luca Nardi | 6-3,4-6,7-6 |
| ITF M15 Perugia | 2021/07/24 14:55 | Andrea Basso v Gabriele Piraino | 6-2,6-1 |
| ITF M15 Perugia | 2021/07/23 14:30 | Dragos Nicolae Madaras v Andrea Basso | 6-1,6-7,5-7 |
| ITF M15 Perugia | 2021/07/22 09:30 | Luciano Darderi v Andrea Basso | 6-7,4-6 |
| ITF M15 Perugia | 2021/07/21 12:00 | Andrea Basso v Alexis Musialek | 6-2,6-3 |
| ITF M15 L'Aquila | 2021/07/16 09:45 | Alexander Weis v Andrea Basso | 7-5,1-6,6-2 |
| UTR Pro Tennis Series Barcelona | 2021/08/14 08:40 | Pablo Carretero v Markos Kalovelonis | 6-7,1-0 |
| UTR Pro Tennis Series Barcelona | 2021/08/12 13:00 | Markos Kalovelonis v Olexiy Kolisnyk | 4-6,4-6 |
| UTR Pro Tennis Series Barcelona | 2021/08/11 07:00 | Markos Kalovelonis v Xavier Gabarro | 6-3,6-0 |
| UTR Pro Tennis Series Barcelona | 2021/08/10 10:00 | Markos Kalovelonis v Andrey Chepelev | 6-7,6-2,3-5 |
| UTR Pro Tennis Series Barcelona | 2021/08/09 13:45 | Markos Kalovelonis v Jaume Pla Malfeito | 6-3,5-3 |
| ITF M25 Telavi | 2021/07/30 06:00 | Marco De Rossi v Markos Kalovelonis | 6-3,6-3 |
| Challenger Nur-Sultan Qual | 2021/07/18 04:00 | Markos Kalovelonis v Sanjar Fayziev | 7-6,3-6,6-7 |
| ITF M25 Nur-Sultan | 2021/07/07 07:00 | Markos Kalovelonis v Lucas Catarina | 6-4,6-7,2-6 |