| UTR Pro Tennis Series Barcelona | 2021/08/11 08:30 | Carretero, Pablo v Kuzey Cekirge | 4-6,6-0,6-0 |
| UTR Pro Tennis Series Barcelona | 2021/08/09 07:00 | Carretero, Pablo v Pereira, Miguel Fernando | 6-7,6-1,6-0 |
| UTR Pro Tennis Series Barcelona | 2021/08/08 10:00 | Bianchi, Nicolas v Carretero, Pablo | 6-1,0-6,6-1 |
| UTR Pro Tennis Series Barcelona | 2021/08/07 13:00 | Daniel Sancho Arbizu v Carretero, Pablo | 3-6,6-3,4-6 |
| UTR Pro Tennis Series Barcelona | 2021/08/06 11:30 | Federico Zeballos v Carretero, Pablo | 6-0,6-1 |
| UTR Pro Tennis Series Barcelona | 2021/08/05 10:00 | Deviatiarov, Marat v Carretero, Pablo | 6-0,6-1 |
| UTR Pro Tennis Series Barcelona | 2021/08/03 08:30 | Jay Friend v Carretero, Pablo | 6-4,5-7,0-5 |
| UTR Pro Tennis Series Barcelona | 2021/08/02 10:00 | Carretero, Pablo v Guerrero Melgar, Angel | 7-6,6-3 |
| UTR Pro Tennis Series Barcelona | 2021/08/12 13:00 | Kalovelonis, Markos v Kolisnyk, Olexiy | 4-6,4-6 |
| UTR Pro Tennis Series Barcelona | 2021/08/11 07:00 | Kalovelonis, Markos v Gabarro, Xavier | 6-3,6-0 |
| UTR Pro Tennis Series Barcelona | 2021/08/10 10:00 | Kalovelonis, Markos v Andrey Chepelev | 6-7,6-2,3-5 |
| UTR Pro Tennis Series Barcelona | 2021/08/09 13:45 | Kalovelonis, Markos v Pla Malfeito, Jaume | 6-3,5-3 |
| ITF M25 Telavi | 2021/07/30 06:00 | de Rossi, Marco v Kalovelonis, Markos | 6-3,6-3 |
| Challenger Nur-Sultan Qual | 2021/07/18 04:00 | Kalovelonis, Markos v Fayziev, Sanjar | 7-6,3-6,6-7 |
| ITF M25 Nur-Sultan | 2021/07/07 07:00 | Kalovelonis, Markos v Lucas Catarina | 6-4,6-7,2-6 |
| ITF - M15 Shymkent | 2021/06/03 07:25 | Manafov, Vladyslav v Kalovelonis, Markos | 6-1,3-6,6-3 |