Stadium: Court 2 Round: 25 Ground: Clay
| ITF M15 Cairo | 2021/09/14 08:15 | Da Silva, Gabriel Ciro v Senthilkumar, Muthu Aadhitiya | 6-2,7-5 |
| ITF M15 Cairo | 2021/09/07 07:30 | Da Silva, Gabriel Ciro v Sean Hess | 5-7,5-7 |
| ITF M15 Cairo | 2021/09/06 08:30 | Da Silva, Gabriel Ciro v Vescovi, Tommaso | 6-1,6-0 |
| ITF - M15 Monastir | 2021/08/30 10:00 | Alec Beckley v Da Silva, Gabriel Ciro | 6-2,6-3 |
| ITF - M15 Monastir | 2021/08/29 09:00 | Haefele, Andres v Da Silva, Gabriel Ciro | 0-6,6-7 |
| ITF - M15 Monastir | 2021/08/24 07:30 | Da Silva, Gabriel Ciro v Sookton-Eng, Chanchai | 4-6,7-6,7-10 |
| ITF - M15 Monastir | 2021/08/23 09:00 | Da Silva, Gabriel Ciro v Takuya Kumasaka | 6-7,7-6,10-6 |
| ITF - M15 Monastir | 2021/08/22 10:00 | Griffith, William v Da Silva, Gabriel Ciro | 6-4,6-7,4-10 |
| ITF M15 Huy | 2021/08/25 12:50 | Eisinga, Zachary v Netuschil, Marvin | 4-6,6-7 |
| ITF M15 Oldenzaal | 2021/08/18 14:10 | Schmitz, Constantin v Eisinga, Zachary | 6-3,7-6 |
| ITF M15 Oldenzaal | 2021/08/16 10:00 | Eisinga, Zachary v van Baal, Aloys Johannes Willem | 3-6,6-4,10-7 |
| ITF M15 Oldenzaal | 2021/08/15 07:30 | Eisinga, Zachary v Peters, Flemming | 6-0,6-3 |
| ITF M25 The Hague | 2021/06/27 08:00 | Dax Donders v Eisinga, Zachary | 6-2,7-5 |
| ITF M25 Alkmaar | 2021/06/21 14:25 | Dermiens, Guillaume v Eisinga, Zachary | 4-6,7-5,13-11 |
| ITF M25 Alkmaar | 2021/06/20 12:30 | Lodewijk Weststrate v Eisinga, Zachary | 2-6,1-6 |
| ITF M15 Cairo | 2021/05/04 08:00 | Eisinga, Zachary v Dimitrov, Martin | 1-6,6-7 |