Stadium: Court 3 Round: 26 Ground: Clay
| ITF W60 Saint-Gaudens | 2021/05/12 09:00 | Kucova, Kristina v Tessah Andrianjafitrimo | 6-3,6-2 |
| ITF W60 Zagreb | 2021/04/30 12:20 | Dulgheru, Alexandra v Kucova, Kristina | 1-6,6-2,6-1 |
| ITF W60 Zagreb | 2021/04/29 08:00 | Anastasia Gasanova v Kucova, Kristina | 5-7,2-6 |
| ITF W60 Zagreb | 2021/04/28 12:30 | Mihaela Djakovic v Kucova, Kristina | 1-6,4-6 |
| WTA - Miami | 2021/03/25 19:00 | Barty, Ashleigh v Kucova, Kristina | 6-3,4-6,7-5 |
| WTA - Miami | 2021/03/24 22:55 | Hailey Baptiste v Kucova, Kristina | 4-6,6-2,5-7 |
| WTA - Miami | 2021/03/23 15:35 | Kucova, Kristina v Anna Karolina Schmiedlova | 6-2,6-3 |
| WTA - Miami | 2021/03/22 15:40 | Yafan Wang v Kucova, Kristina | 5-7,2-6 |
| ITF W60 Saint-Gaudens | 2021/05/12 09:10 | Elsa Jacquemot v Zimmermann, Kimberley | 5-7,3-6 |
| ITF W60 Saint-Gaudens | 2021/05/11 11:00 | Yerolymos, Margot v Zimmermann, Kimberley | 6-1,6-1 |
| ITF W60 Saint-Gaudens | 2021/05/10 06:55 | Zimmermann, Kimberley v Sara Cakarevic | 6-1,2-6,10-7 |
| ITF W25 Prague | 2021/05/02 13:00 | Zimmermann, Kimberley v Alice Rame | 4-6,4-6 |
| ITF W60 Oeiras | 2021/04/11 14:50 | Su Jeong Jang v Zimmermann, Kimberley | 6-3,6-3 |
| ITF W60 Bellinzona | 2021/04/05 08:00 | Zimmermann, Kimberley v Lucia Bronzetti | 0-6,7-5,8-10 |
| ITF W60 Bellinzona | 2021/04/04 09:55 | Zimmermann, Kimberley v Detiuc, Anastasia | 6-3,4-6,10-6 |
| ITF W15 Bratislava | 2021/03/17 16:20 | Zimmermann, Kimberley v Bornay, Jade | 2-6,6-4,6-0 |