Stadium: Ct 1 Round: 25 Ground: Hardcourt outdoor
| Challenger Newport Beach Qual | 2018/01/20 18:00 | Cristian Garin v Alexander Sarkissian | 7-6,6-4 |
| ITF USA F1 | 2018/01/05 18:00 | Alexander Sarkissian v Christopher Eubanks | 7-6,5-7,3-6 |
| ITF USA F1 | 2018/01/04 18:00 | Alexander Sarkissian v Martin Redlicki | 6-1,6-3 |
| ITF USA F1 | 2018/01/02 19:50 | Alexander Sarkissian v JC Aragone | 3-6,7-5,6-1 |
| ITF USA F38 | 2017/11/24 15:00 | Luke Bambridge v Alexander Sarkissian | 7-6,6-2 |
| ITF USA F38 | 2017/11/23 15:00 | Hunter Callahan v Alexander Sarkissian | 2-6,5-7 |
| ITF USA F38 | 2017/11/21 20:45 | Jarryd Woog v Alexander Sarkissian | 3-6,4-6 |
| Challenger Champaign | 2017/11/14 17:30 | Alexander Sarkissian v Taylor Fritz | 2-6,1-6 |
| Challenger Bangkok | 2018/01/12 05:00 | Marcel Granollers v Yusuke Takahashi | 6-4,6-1 |
| Challenger Bangkok | 2018/01/11 03:00 | Emil Ruusuvuori v Yusuke Takahashi | 6-3,3-6,3-6 |
| Challenger Bangkok | 2018/01/09 07:40 | Mukund Sasikumar v Yusuke Takahashi | 2-6,7-5,0-6 |
| Challenger Bangkok | 2018/01/02 06:30 | Yusuke Takahashi v Aleksandr Nedovyesov | 4-6,4-6 |
| Australian Open - Wild Card | 2017/12/01 03:15 | Yusuke Takahashi v Hiroki Moriya | 6-3,3-6,5-7 |
| Australian Open - Wild Card | 2017/11/29 03:20 | Yusuke Takahashi v Zihao Xia | 6-1,6-1 |
| Challenger Hua Hin | 2017/11/22 05:25 | Marinko Matosevic v Yusuke Takahashi | 7-6,6-4 |
| Challenger Toyota | 2017/11/14 02:20 | Yusuke Takahashi v Matthew Ebden | 1-6,6-7 |