Stadium: ??ードコート4H Round: 62 Ground: Hardcourt outdoor
| ITF Hong Kong F6 | 2017/12/31 03:00 | Sakai, Yuto v Lim, Alberto | 6-7,4-6 |
| ITF Hong Kong F5 | 2017/12/24 02:00 | Oh, Chan-Yeong v Sakai, Yuto | 6-3,6-3 |
| ITF Hong Kong F5 | 2017/12/23 02:00 | Sakai, Yuto v 콩카르, 콩섭 | 6-4,6-4 |
| Challenger Toyota Qual | 2017/11/11 07:35 | 에하라, 히로야스 v Sakai, Yuto | 6-7,6-2,6-3 |
| Challenger Toyota Qual | 2017/11/11 02:15 | Sakai, Yuto v Osafune, Masaki | 7-6,1-6,6-1 |
| Challenger Kobe Qual | 2017/11/04 05:20 | Sakai, Yuto v 푸쿠다, 소라 | 1-6,3-6 |
| ITF Japan F8 | 2017/06/15 01:00 | Sakai, Yuto v 와타누키, 유스케 | 4-6,6-3,3-6 |
| ITF Japan F8 | 2017/06/14 01:00 | Sakai, Yuto v Ono, Yohei | 7-5,6-0 |
| Turkey F6, Singles Qualifying | 2018/02/10 09:00 | Kim, Hyeong Don v Apostol, Andrei Stefan | 2-6,2-6 |
| ITF Kuwait F2 | 2017/11/05 06:00 | Apostol, Andrei Stefan v Du Toit, Lance-Pierre | 3-6,6-7 |
| ITF Italy F33 | 2017/10/10 15:10 | 바소, 안드레아 v Apostol, Andrei Stefan | 6-1,6-2 |
| ITF Italy F33 Qual | 2017/10/09 15:55 | Apostol, Andrei Stefan v 필리프, 블라디미르 | 6-1,6-1 |
| Italy F32, Singles | 2017/10/04 17:25 | Apostol, Andrei Stefan v 케크마노비치, 미오밀 | 0-6,0-6 |
| Italy F32, Singles | 2017/10/03 14:55 | Apostol, Andrei Stefan v 골크, 델프 | 6-2,6-3 |
| ITF Italy F32 Qual | 2017/10/02 16:45 | Apostol, Andrei Stefan v 스드줌, 마르셀 마를론 | 6-0,6-2 |
| Challenger Sibiu Qual | 2017/09/16 08:00 | 만다, 칼린 v Apostol, Andrei Stefan | 6-3,6-4 |