Stadium: Hard Court Central Round: 26 Ground: Hardcourt outdoor
| ITF - M15 Héraklion | 2021/06/01 08:00 | Alexander Donski v Kelsey Stevenson | 6-3,6-2 |
| ITF - M15 Monastir | 2021/05/14 08:30 | Omni Kumar v Alexander Donski | 2-6,7-5,6-3 |
| ITF - M15 Monastir | 2021/05/13 08:30 | Alexander Donski v Pervolarakis, Michail | 7-6,7-6 |
| ITF - M15 Monastir | 2021/05/11 08:20 | Pereira, Miguel Fernando v Alexander Donski | 4-6,3-6 |
| ITF - M15 Monastir | 2021/05/08 08:30 | Lucas Catarina v Alexander Donski | 7-6,1-6,6-4 |
| ITF - M15 Monastir | 2021/05/07 08:30 | Crepaldi, Erik v Alexander Donski | 6-7,7-5,4-6 |
| ITF - M15 Monastir | 2021/05/06 08:25 | Saito, Takashi v Alexander Donski | 6-7,1-6 |
| ITF - M15 Monastir | 2021/05/04 09:00 | Alexander Donski v Shintaro Imai | 7-5,6-4 |
| ITF - M15 Héraklion | 2021/06/02 09:50 | Stalder, Reese v Uzhylovsky, Vladimir | 6-3,7-5 |
| ITF - M15 Héraklion | 2021/06/01 06:30 | Stalder, Reese v Zemel, Yankel | 6-1,6-4 |
| ITF - M15 Héraklion | 2021/05/31 06:30 | Stalder, Reese v Stijn Pel | 6-4,4-6,10-7 |
| ITF - M15 Héraklion | 2021/05/30 09:00 | Stalder, Reese v Matthew Dellavedova | 6-3,2-6,10-4 |
| ITF - M15 Héraklion | 2021/05/20 08:35 | Stalder, Reese v Graziani, Edoardo | 2-6,5-7 |
| ITF - M15 Héraklion | 2021/05/19 08:00 | Vivero Gonzalez, Pablo v Stalder, Reese | 1-6,4-6 |
| ITF - M15 Héraklion | 2021/05/18 06:30 | Stalder, Reese v Leonardo Taddia | 6-1,2-6,10-6 |
| ITF - M15 Héraklion | 2021/05/17 07:00 | Stalder, Reese v Jimmy Yang | 6-2,6-3 |