Stadium: Court 1 Round: 44 Ground: Clay
| ITF M15 Cairo | 2021/04/11 11:00 | Kolisnyk, Olexiy v Alcalde, Juan Ignacio | 6-3,6-3 |
| ITF M15 Novomoskovsk | 2021/05/24 12:00 | Kolisnyk, Olexiy v Alexander Zgirovsky | 7-6,2-6,8-10 |
| ITF M15 Novomoskovsk | 2021/05/23 08:00 | Kolisnyk, Olexiy v Boychuk, Roman | 6-4,2-6,10-8 |
| ITF M15 Cairo | 2021/05/05 11:00 | Jose Pereira v Kolisnyk, Olexiy | 7-5,6-0 |
| ITF M15 Cairo | 2021/05/04 08:00 | Felix Gill v Kolisnyk, Olexiy | 1-6,3-6 |
| ITF M15 Cairo | 2021/05/03 09:00 | Syed Naguib, Syed Mohd Agil v Kolisnyk, Olexiy | 1-6,1-6 |
| ITF M15 Cairo | 2021/05/02 10:00 | Kolisnyk, Olexiy v Yuichiro Inui | 6-4,6-3 |
| ITF M15 Cairo | 2021/04/26 08:00 | Kolisnyk, Olexiy v Gian Marco Ortenzi | 4-6,4-6 |
| ITF M15 Cairo | 2021/04/25 12:30 | Leonardo Rossi v Kolisnyk, Olexiy | 5-7,6-1,2-10 |
| ITF M15 Novomoskovsk | 2021/05/25 06:15 | Bielinskyi, Oleksandr v Alcalde, Juan Ignacio | 6-2,6-2 |
| ITF M15 Novomoskovsk | 2021/05/23 10:30 | Alcalde, Juan Ignacio v Fellin, Manfred | 7-6,2-6,10-3 |
| ITF - M25 Vic | 2021/05/16 08:00 | Matas Ortega, Xavi v Alcalde, Juan Ignacio | 7-5,7-5 |
| ITF M15 Valldoreix | 2021/05/09 12:00 | Diego F Flores v Alcalde, Juan Ignacio | 6-1,6-3 |
| ITF M15 Majadahonda | 2021/05/02 14:45 | Pedro Vives Marcos v Alcalde, Juan Ignacio | 6-3,7-5 |
| ITF M15 Cairo | 2021/04/21 12:05 | Shintaro Mochizuki v Alcalde, Juan Ignacio | 6-3,7-5 |
| ITF M15 Cairo | 2021/04/20 09:45 | Fares Zakaria v Alcalde, Juan Ignacio | 7-6,2-6,5-10 |
| ITF M15 Cairo | 2021/04/18 08:30 | Maikel De Boes v Alcalde, Juan Ignacio | 5-7,3-6 |