Stadium: Court 11 Round: 62
| ITF M15 - Xàtiva | 2021/08/02 10:00 | Xavi Matas Ortega v Grigoriy Korobeynikov | 6-0,6-0 |
| ITF M15 - Xàtiva | 2021/08/01 13:00 | Lawrence Bataljin v Grigoriy Korobeynikov | 7-5,2-6,8-10 |
| ITF - M15 Şımkent | 2021/06/01 05:00 | Yaraslav Shyla v Grigoriy Korobeynikov | 6-0,7-5 |
| ITF - M15 Şımkent | 2021/05/31 05:00 | Rail Ibragimov v Grigoriy Korobeynikov | 4-6,4-6 |
| ITF - M15 Şımkent | 2021/05/25 06:00 | Olimjon Nabiev v Grigoriy Korobeynikov | 6-1,6-4 |
| ITF - M15 Şımkent | 2021/05/24 04:00 | Arystanbek Kaparov v Grigoriy Korobeynikov | 1-6,1-6 |
| ITF M15 - Benicarló | 2020/11/22 14:00 | Alexander Weis v Grigoriy Korobeynikov | 6-2,7-5 |
| ITF M15 Loule | 2020/03/08 14:00 | Leonardo Civita-Telles v Grigoriy Korobeynikov | 6-2,6-4 |
| ITF M15 - Melilla | 2021/09/24 15:10 | Miguel Damas v Edas Butvilas | 6-7,6-4,6-2 |