Stadium: Court 10 Round: 25 Ground: Clay
| ITF Women Denain | 2017/07/06 12:05 | Ianchuk, Olga v Osaka, Mari | 0-6,6-7 |
| ITF Women Orlando Qual | 2018/01/14 15:00 | Osaka, Mari v Whoriskey, Caitlin | 3-6,6-7 |
| ITF Women Daytona Beach | 2018/01/12 15:00 | Osaka, Mari v Grace Min | 6-7,4-6 |
| ITF Women Daytona Beach | 2018/01/11 16:30 | Elena-Gabriela Ruse v Osaka, Mari | 6-7,3-6 |
| ITF Women Daytona Beach | 2018/01/11 01:05 | Osaka, Mari v Kyoka Okamura | 6-1,6-1 |
| WTA Honolulu Qual | 2017/11/19 22:45 | Osaka, Mari v Haruka Kaji | 3-6,5-7 |
| WTA Limoges Qual | 2017/11/05 12:00 | Osaka, Mari v Saez Larra, Olga | 6-1,3-6,6-7 |
| WTA Limoges Qual | 2017/11/04 13:35 | Soler-Espinosa, Silvia v Osaka, Mari | 3-6,7-6,4-6 |
| ITF Women Nantes | 2017/11/01 15:10 | Kaia Kanepi v Osaka, Mari | 2-6,7-6,6-0 |
| Orlando, Singles Qualifying W-WITF-USA-02A | 2018/01/17 18:15 | Ianchuk, Olga v Sanchez, Maria | 3-6,5-7 |
| Zawada, Singles W-WITF-POL-07A | 2017/11/17 14:10 | Ianchuk, Olga v Deborah Chiesa | 3-6,6-7 |
| Zawada, Singles W-WITF-POL-07A | 2017/11/16 10:30 | Ianchuk, Olga v Jesika Maleckova | 5-7,6-3,6-2 |
| Zawada, Singles W-WITF-POL-07A | 2017/11/15 10:00 | Ianchuk, Olga v Forys, Weronika Jasmina | 7-6,7-6 |
| ITF Women Nantes | 2017/11/04 13:30 | Hogenkamp, Richel v Ianchuk, Olga | 6-4,6-4 |
| ITF Women Nantes | 2017/11/03 11:30 | Ianchuk, Olga v Conny Perrin | 6-1,6-2 |
| ITF Women Nantes Qual | 2017/11/02 11:30 | Lesley Pattinama Kerkhove v Ianchuk, Olga | 5-7,4-6 |
| ITF Women Nantes Qual | 2017/11/01 10:30 | Ianchuk, Olga v Irina Ramialison | 7-6,0-6,6-4 |