Stadium: Court 4 Round: 62 Ground: Hardcourt outdoor
| ITF M15 Cairo | 2021/09/13 08:00 | Ioannis Kountourakis v Maikel De Boes | 4-6,4-6 |
| ITF M15 Cairo | 2021/09/07 07:30 | Tobias Franco v Ioannis Kountourakis | 6-4,6-2 |
| ITF M15 Cairo | 2021/09/06 08:30 | Antonio Mazzeo v Ioannis Kountourakis | 2-6,4-6 |
| ITF M15 Cairo | 2021/09/05 07:30 | Ioannis Kountourakis v Atharva Sharma | 6-4,6-3 |
| ITF M15 Cairo | 2021/08/30 09:00 | Louis Allen v Ioannis Kountourakis | 6-7,6-4,10-6 |
| ITF M15 L'Aquila | 2021/07/11 07:00 | Ioannis Kountourakis v Federico Bertuccioli | 3-6,4-6 |
| ITF M15 Heraklion | 2021/06/08 08:00 | Petros Tsitsipas v Ioannis Kountourakis | 6-1,7-6 |
| ITF M15 Heraklion | 2021/05/30 11:00 | Eduardo Cohen v Ioannis Kountourakis | 4-6,6-0,10-7 |
| ITF M15 Cancun | 2021/10/13 19:05 | Naoki Tajima v Nikolas Moceanu | 6-3,6-2 |
| ITF M15 Cancun | 2021/10/05 14:00 | Matt Kuhar v Nikolas Moceanu | 6-4,6-4 |
| ITF M15 Cancun | 2021/09/26 15:00 | Nikolas Moceanu v Julian Cundom | 6-1,4-6,9-11 |
| ITF M15 Cancun | 2021/09/22 14:00 | Murkel Dellien v Nikolas Moceanu | 6-3,6-3 |
| ITF M15 Cancun | 2021/09/21 14:00 | Colin Markes v Nikolas Moceanu | 6-3,6-2 |
| ITF M15 Cancun | 2021/09/19 14:00 | Nikolas Moceanu v Oscar Matias Leiva Biason | 6-1,6-3 |
| ITF M15 Monastir | 2021/08/01 10:00 | Nikolas Moceanu v Martin Dimitrov | 3-6,2-6 |
| ITF M15 Monastir | 2021/07/28 10:15 | Joshua Sheehy v Nikolas Moceanu | 3-6,6-1,6-2 |