Stadium: Court 5 Round: 25
| ITF China F5 Qual | 2018/05/07 06:30 | Hovhannisyan, Mousheg v Ye Cong Mo | 1-6,7-6,1-6 |
| ITF China F5 Qual | 2018/05/07 04:10 | Hovhannisyan, Mousheg v Ji, Ang | 6-1,6-2 |
| ITF China F5 Qual | 2018/05/05 05:30 | Hovhannisyan, Mousheg v Wellington Bastos | 6-0,6-0 |
| ITF China F4 | 2018/05/01 05:25 | Kim, Cheong-Eui v Hovhannisyan, Mousheg | 6-4,6-3 |
| ITF USA F12 | 2018/04/24 16:45 | Harrison Adams v Hovhannisyan, Mousheg | 6-1,6-4 |
| ITF USA F11 | 2018/04/19 15:35 | Noah Rubin v Hovhannisyan, Mousheg | 6-3,6-0 |
| ITF USA F11 | 2018/04/17 15:55 | Irigaray Guarne, Pablo v Hovhannisyan, Mousheg | 7-5,6-7,3-6 |
| ITF USA F8 Qual | 2018/03/17 17:00 | Craig, Henry v Hovhannisyan, Mousheg | 6-2,6-3 |
| ITF Japan F6 Qual | 2018/04/08 04:00 | Ono, Masayoshi v Onoda, Ken | 6-2,6-4 |
| ITF Japan F5 | 2018/04/01 00:30 | Onoda, Ken v Sasai, Masaki | 3-6,1-6 |
| ITF Japan F5 | 2018/03/31 00:30 | Saito, Takashi v Onoda, Ken | 3-6,4-6 |
| ITF Greece F3 | 2018/03/10 07:30 | Moreno, Federico v Onoda, Ken | 6-3,6-4 |
| ITF Greece F2 | 2018/03/04 08:00 | Duje Ajdukovic v Onoda, Ken | 7-5,7-6 |
| ITF Greece F2 | 2018/03/03 07:30 | Onoda, Ken v Lavdas, Andreas Anastasis | 6-1,6-2 |
| Turkey F8, Singles Qualifying | 2018/02/27 07:30 | Felipe Meligeni Rodrigues Alves v Onoda, Ken | 6-4,6-2 |
| Turkey F8, Singles Qualifying | 2018/02/25 07:30 | Amar, Ran v Onoda, Ken | 3-6,5-7 |