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