Stadium: Court 6 Round: 44 Ground: Clay
| ITF Kazakhstan F3 Qual | 2018/04/08 07:30 | Murat, Yerassyl v Korobeynikov, Grigoriy | 3-6,1-6 |
| ITF Spain F7 | 2018/03/19 08:00 | Vittar, Francisco v Korobeynikov, Grigoriy | 6-1,7-5 |
| ITF Spain F7 | 2018/03/16 12:00 | Tang, Kyle Lok Yin v Korobeynikov, Grigoriy | 1-6,4-6 |
| ITF Spain F6 Qual | 2018/03/10 12:00 | Korobeynikov, Grigoriy v George Loffhagen | 1-6,3-6 |
| ITF Portugal F2 Qual | 2018/02/25 16:00 | Joffrey De Schepper v Korobeynikov, Grigoriy | 6-1,6-1 |
| ITF Portugal F2 Qual | 2018/02/25 13:00 | Korobeynikov, Grigoriy v Exposito, Adrian | 2-6,7-5,6-1 |
| ITF Portugal F2 Qual | 2018/02/24 10:00 | Korobeynikov, Grigoriy v Krattiger, Jesse Paul | 6-1,6-3 |
| ITF Portugal F1 | 2018/02/17 12:30 | Korobeynikov, Grigoriy v Matos, Diego | 2-6,3-6 |
| ITF Russia F3 | 2018/03/12 07:00 | Betov, Sergey v Dubinsky, Vladislav | 7-6,6-7,6-3 |
| ITF Russia F3 | 2018/03/11 07:00 | Dubinsky, Vladislav v Besednikov, Oleg | 6-1,6-1 |
| ITF Russia F2 | 2018/03/04 07:00 | Arkhipov, Petr v Dubinsky, Vladislav | 6-4,6-2 |
| ITF Russia F2 | 2018/03/03 09:00 | Mikhaylyuk, Ivan v Dubinsky, Vladislav | 6-7,6-3,4-6 |
| ITF Kazakhstan F2 Qual | 2018/02/18 04:00 | Sabanov, Matej v Dubinsky, Vladislav | 6-3,3-6,6-1 |
| Egypt F5, Singles Qualifying | 2018/02/10 08:00 | Dubinsky, Vladislav v Liska, Tomas | 1-6,6-1,2-6 |
| ITF Egypt F4 | 2018/02/08 09:15 | Dubinsky, Vladislav v David Poljak | 1-6,3-6 |
| ITF Egypt F4 | 2018/02/07 09:35 | Gunduboina, Nitin v Dubinsky, Vladislav | 0-6,2-6 |