| Billie Jean King Cup 2022, Finals | 2018/04/17 08:00 | Suomalainen, Piia v Ratkovic, Divna | 6-1,6-1 |
| 페드 컵 월드 그룹 | 2018/04/16 08:00 | Suomalainen, Piia v 무라, 주디스 | 6-2,6-1 |
| ITF Women Heraklion | 2018/03/28 09:20 | 사비노, 리사 v Suomalainen, Piia | 6-3,6-1 |
| ITF Women Heraklion | 2018/03/26 07:00 | Suomalainen, Piia v 란카, 사라 | 6-0,6-3 |
| ITF Women Heraklion | 2018/03/20 11:20 | Suomalainen, Piia v 존스, 프란세스카 | 3-6,4-6 |
| ITF Women Heraklion | 2018/03/19 08:00 | Suomalainen, Piia v 인터트, 소피아 | 6-0,6-2 |
| ITF Women Heraklion | 2018/03/18 09:30 | Suomalainen, Piia v Mejic, Mila | 6-1,7-5 |
| ITF Women Heraklion | 2018/03/12 08:00 | Suomalainen, Piia v Staiculescu, Alexandra Maria | 1-6,3-6 |
| Billie Jean King Cup 2022, Finals | 2018/04/17 08:00 | Poluta, Katie v 무라, 주디스 | 6-1,6-0 |
| Billie Jean King Cup 2022, Finals | 2018/04/16 08:00 | Poluta, Katie v 드라스코비치, 안자 | 6-2,4-6,6-2 |