Stadium: Court 10 Round: 54 Ground: Clay
| 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 Faro | 2020/03/01 13:00 | Marvin Moeller v Korobeynikov, Grigoriy | 6-2,6-2 |
| ITF - M15 Antalya | 2020/02/11 08:30 | Leyton Rivera v Korobeynikov, Grigoriy | 6-0,6-2 |
| ITF - M15 Antalya | 2020/02/02 12:30 | Shimizu, Kazuki v Korobeynikov, Grigoriy | 7-6,6-2 |
| ITF - M15 Héraklion | 2019/11/10 07:30 | Dimitrov, Martin v Korobeynikov, Grigoriy | 6-3,6-4 |
| Castellon, Singles Qualifying M-ITF-ESP-34A | 2019/11/05 10:00 | Korobeynikov, Grigoriy v Chavez Villalpando, Luis Diego | 6-4,3-6,7-10 |
| Castellon, Singles Qualifying M-ITF-ESP-34A | 2019/11/04 13:30 | Korobeynikov, Grigoriy v Filippo Giovannini | 6-2,6-1 |