Stadium: Center Court Round: 54 Ground: Hardcourt outdoor
| ITF W100 Contrexeville | 2021/07/04 08:00 | Wuarin, Pauline v Leolia Jeanjean | 0-6,0-6 |
| Swiss Tennis Masters Women | 2020/07/04 15:00 | Wuarin, Pauline v Arlinda Rushiti | 3-6,2-6 |
| Swiss Tennis Masters Women | 2020/07/03 08:30 | Lulu Sun v Wuarin, Pauline | 6-2,7-5 |
| ITF W25 Antalya | 2020/03/01 07:00 | Wuarin, Pauline v Ekaterina Shalimova | 6-7,3-6 |
| ITF - W15 Antalya | 2020/02/25 10:00 | Wuarin, Pauline v Anna Gabric | 2-6,6-2,6-10 |
| Grenoble, Singles Qualifying W-ITF-FRA-04A | 2020/02/09 09:00 | Wuarin, Pauline v Carole Monnet | 2-6,1-6 |
| ITF W15 Palmanova | 2020/02/06 10:05 | Lucia Cortez Llorca v Wuarin, Pauline | 6-1,6-2 |
| ITF - W15 Manacor | 2020/01/28 11:00 | Wuarin, Pauline v Suzan Lamens | 4-6,2-6 |
| ITF W100 Contrexeville | 2021/07/04 09:05 | Mariia Kostiuk v Tina Nadine Smith | 0-6,0-6 |
| ITF W60 Montpellier | 2021/06/27 15:10 | Mariia Kostiuk v Camilla Rosatello | 0-6,0-6 |
| UTR Pro Tennis Series Barcelona Women | 2021/06/13 09:30 | Mariia Kostiuk v Baglow, Eleanor | 1-6,2-6 |
| UTR Pro Tennis Series Barcelona Women | 2021/06/10 08:00 | Mariia Kostiuk v Romy Kolzer | 0-6,1-6 |
| UTR Pro Tennis Series Barcelona Women | 2021/06/09 12:00 | Mariia Kostiuk v Ivakhnenko, Valentyna | 1-6,1-5 |
| ITF W25 Madrid | 2021/06/06 09:00 | Mariia Kostiuk v Maria Garcia Cid | 1-6,1-6 |
| ITF W25 Calvi | 2021/04/11 12:10 | Rebecca Amerio v Mariia Kostiuk | 6-4,6-1 |
| ITF W25 Manacor | 2021/03/09 09:00 | Olga Parres Azcoitia v Mariia Kostiuk | 6-2,6-1 |