Stadium: S Round: 25
| ITF Women Indian Harbour | 2018/04/11 14:30 | Olga Ianchuk v Victoria Duval | 4-6,2-6 |
| WTA Monterrey Qual | 2018/03/31 18:10 | Jovana Jaksic v Olga Ianchuk | 6-3,3-6,6-4 |
| WTA Acapulco Qual | 2018/02/25 01:45 | Arantxa Rus v Olga Ianchuk | 6-2,6-1 |
| ITF Women Rancho Santa Fe Qual | 2018/02/22 02:20 | Olga Ianchuk v Paula Cristina Goncalves | 6-1,6-7,4-6 |
| ITF Women Surprise | 2018/02/17 19:30 | Olga Ianchuk v Ana Sofia Sanchez | 4-6,6-7 |
| ITF Women Surprise | 2018/02/17 01:40 | Evgeniya Rodina v Olga Ianchuk | 6-7,6-4,3-6 |
| ITF Women Surprise | 2018/02/16 19:00 | Olga Ianchuk v Usue Maitane Arconada | 6-3,2-6,6-1 |
| ITF Women Surprise | 2018/02/13 22:25 | Danielle Lao v Olga Ianchuk | 6-4,6-7,6-7 |
| ITF Women Indian Harbour | 2018/04/11 19:10 | Risa Ozaki v Taylor Townsend | 2-6,1-6 |
| WTA Monterrey | 2018/04/03 02:00 | Risa Ozaki v Magdalena Rybarikova | 4-6,3-6 |
| ITF Women Canberra | 2018/03/21 02:00 | Jaimee Fourlis v Risa Ozaki | 6-2,6-1 |
| ITF Women Shenzhen | 2018/03/13 02:00 | Viktoria Hruncakova v Risa Ozaki | 6-4,6-2 |
| WTA Indian Wells Qual | 2018/03/05 20:35 | Su-Wei Hsieh v Risa Ozaki | 6-4,6-3 |
| WTA Indian Wells Qual | 2018/02/24 20:00 | Risa Ozaki v Francesca Di Lorenzo | 4-6,2-6 |
| WTA Doha Qual | 2018/02/10 12:35 | Monica Niculescu v Risa Ozaki | 6-1,6-0 |
| WTA Taipei | 2018/01/30 06:10 | Yafan Wang v Risa Ozaki | 6-2,6-4 |