Stadium: Clay 1 Round: 62 Ground: Hardcourt outdoor
| ITF Turkey F37 | 2018/11/19 06:30 | Mancineiras Cornella, Oscar v Korobeynikov, Grigoriy | 3-6,3-6 |
| ITF Turkey F36 | 2018/11/11 07:00 | Roumane, Rayane v Korobeynikov, Grigoriy | 6-0,6-3 |
| Challenger Tashkent | 2018/10/06 05:00 | Yunseong Chung v Korobeynikov, Grigoriy | 6-0,6-0 |
| ITF Kazakhstan F8 | 2018/09/24 03:30 | Korobeynikov, Grigoriy v Abzalov, Sharobiddin | 2-6,1-6 |
| ITF Kazakhstan F8 | 2018/09/23 06:55 | Peters, Flemming v Korobeynikov, Grigoriy | 7-5,6-7,1-6 |
| ITF Kazakhstan F8 | 2018/09/22 06:05 | Beresnev, Stepan v Korobeynikov, Grigoriy | 6-1,3-6,0-6 |
| ITF Kazakhstan F7 | 2018/09/16 06:10 | Max Houkes v Korobeynikov, Grigoriy | 6-3,6-1 |
| ITF Kazakhstan F7 | 2018/09/15 05:00 | Korobeynikov, Grigoriy v Broekhof, Nick | 6-3,7-5 |
| ITF Turkey F37 | 2018/11/19 06:30 | Simion, Alexander v van Wijk, Max | 6-4,6-4 |
| ITF Turkey F36 | 2018/11/10 08:30 | Arjun Mehrotra v Simion, Alexander | 4-6,6-1,6-2 |
| ITF Romania F12 | 2018/09/02 11:00 | Edoardo Lavagno v Simion, Alexander | 6-1,6-4 |
| ITF Romania F11 | 2018/08/25 06:00 | Bogdan Pavel v Simion, Alexander | 6-3,6-0 |
| ITF Romania F10 | 2018/08/19 10:30 | Alekseenko, Vadim v Simion, Alexander | 6-4,6-2 |
| ITF Romania F8 | 2018/08/08 11:30 | Bensoussan, Samuel v Simion, Alexander | 6-0,6-1 |
| ITF Romania F2 Qual | 2018/05/27 07:00 | Hank, Tigre v Simion, Alexander | 6-4,6-3 |
| ITF Romania F1 | 2018/05/23 08:00 | Simion, Alexander v Antonescu, Vasile | 0-6,0-6 |