Stadium: Hard Court 4 Round: 62 Ground: Hardcourt outdoor
| ITF Hong Kong F6 | 2017/12/31 03:00 | Yuto Sakai v Alberto Lim | 6-7,4-6 |
| ITF Hong Kong F5 | 2017/12/24 02:00 | Chan-Yeong Oh v Yuto Sakai | 6-3,6-3 |
| ITF Hong Kong F5 | 2017/12/23 02:00 | Yuto Sakai v Congsup Congcar | 6-4,6-4 |
| Challenger Toyota Qual | 2017/11/11 07:35 | Hiroyasu Ehara v Yuto Sakai | 6-7,6-2,6-3 |
| Challenger Toyota Qual | 2017/11/11 02:15 | Yuto Sakai v Masaki Osafune | 7-6,1-6,6-1 |
| Challenger Kobe Qual | 2017/11/04 05:20 | Yuto Sakai v Sora Fukuda | 1-6,3-6 |
| ITF Japan F8 | 2017/06/15 01:00 | Yuto Sakai v Yusuke Watanuki | 4-6,6-3,3-6 |
| ITF Japan F8 | 2017/06/14 01:00 | Yuto Sakai v Yohei Ono | 7-5,6-0 |
| ITF Turkey F6 | 2018/02/10 09:00 | Hyeong Don Kim v Andrei Stefan Apostol | 2-6,2-6 |
| ITF Kuwait F2 | 2017/11/05 06:00 | Andrei Stefan Apostol v Lance-Pierre Du Toit | 3-6,6-7 |
| ITF Italy F33 | 2017/10/10 15:10 | Andrea Basso v Andrei Stefan Apostol | 6-1,6-2 |
| ITF Italy F33 Qual | 2017/10/09 15:55 | Andrei Stefan Apostol v Vladimir Filip | 6-1,6-1 |
| ITF Italy F32 | 2017/10/04 17:25 | Andrei Stefan Apostol v Miomir Kecmanovic | 0-6,0-6 |
| ITF Italy F32 | 2017/10/03 14:55 | Andrei Stefan Apostol v Delf Gohlke | 6-2,6-3 |
| ITF Italy F32 Qual | 2017/10/02 16:45 | Andrei Stefan Apostol v Marcel Marlon Sudzum | 6-0,6-2 |
| Challenger Sibiu Qual | 2017/09/16 08:00 | Calin Manda v Andrei Stefan Apostol | 6-3,6-4 |