Stadium: Court 5 Round: 62 Ground: Clay
| ITF - M25 Poznan | 2021/08/22 08:00 | Jose Pereira v Louis Allen | 6-2,6-2 |
| ITF - M15 Oldenzaal | 2021/08/16 10:00 | Dominik Boehler v Louis Allen | 6-1,6-1 |
| ITF - M15 Oldenzaal | 2021/08/15 12:00 | Louis Allen v Floris Podzimek | 6-3,6-3 |
| ITF - M15 Curtea de Arges | 2021/08/09 07:00 | Bogdan Ionut Apostol v Louis Allen | 6-2,6-3 |
| ITF - M15 Skopje | 2021/05/31 08:00 | Tom Gentzsch v Louis Allen | 7-6,2-6,13-11 |
| ITF - M15 Skopje | 2021/05/30 07:00 | Louis Allen v Leonid Sheyngezikht | 6-4,7-5 |
| ITF - M15 Bukurešť | 2021/05/24 08:00 | Valentin Royer v Louis Allen | 6-3,6-1 |
| ITF - M15 Monastir | 2021/04/12 08:00 | Remy Bertola v Louis Allen | 6-2,6-0 |
| 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 Heraklion | 2021/05/23 06:30 | Ioannis Kountourakis v Christos Avraam | 6-1,4-6,7-10 |
| ITF - M15 Heraklion | 2021/05/16 10:30 | Ioannis Kountourakis v David Eisenzapf | 3-6,1-6 |
| ITF - M15 Monastir | 2021/04/05 08:00 | Ioannis Kountourakis v Vitali Shvets | 4-6,6-0,6-10 |
| ITF - M15 Monastir | 2021/04/04 09:00 | Simon Yitbarek v Ioannis Kountourakis | 4-6,6-2,7-10 |
| ITF - M15 Monastir | 2021/03/28 11:30 | Ioannis Kountourakis v Tomas Liska | 3-6,4-6 |