Stadium: Court 3 Round: 26 Ground: Clay
| ITF W25 Verbier | 2021/08/24 09:15 | Nadine Keller v Aurora Zantedeschi | 6-2,6-1 |
| ITF - W15 Monastir | 2021/07/28 10:25 | Olga Helmi v Nadine Keller | 7-5,6-3 |
| ITF - W15 Monastir | 2021/07/27 09:00 | Nadine Keller v Jimar G G Gonzalez | 6-0,6-4 |
| ITF - W15 Monastir | 2021/07/26 11:30 | Nadine Keller v Smriti Bhasin | 6-2,6-1 |
| ITF - W15 Monastir | 2021/07/22 10:40 | Nadine Keller v Eliessa Vanlangendonck | 0-6,0-6 |
| ITF - W15 Monastir | 2021/07/21 08:30 | Nadine Keller v Humera Baharmus | 6-4,6-2 |
| ITF W25 Klosters | 2021/06/23 10:00 | Camilla Rosatello v Nadine Keller | 6-3,6-3 |
| ITF W25 Klosters | 2021/06/22 07:00 | Sandy Marti v Nadine Keller | 5-7,3-6 |
| ITF W25 Verbier | 2021/08/25 14:40 | Alina Granwehr v Zuger, Joanne | 4-6,2-6 |
| ITF W25 Oldenzaal | 2021/08/19 11:10 | Zuger, Joanne v Alexandra Ignatik | 2-6,1-6 |
| ITF W25 Oldenzaal | 2021/08/18 08:00 | Zuger, Joanne v Emiliana Arango | 6-2,3-6,6-2 |
| ITF W25 Telavi | 2021/07/18 12:00 | Zuger, Joanne v Suzan Lamens | 5-7,2-6 |
| ITF W25 Telavi | 2021/07/17 09:55 | Marine Partaud v Zuger, Joanne | 6-7,4-6 |
| ITF W25 Telavi | 2021/07/16 06:30 | Zuger, Joanne v Yvonne Cavalle-Reimers | 6-1,6-4 |
| ITF W25 Telavi | 2021/07/15 07:55 | Lina Gjorcheska v Zuger, Joanne | 5-7,4-6 |
| ITF W100 Contrexeville | 2021/07/05 13:10 | Zuger, Joanne v Leolia Jeanjean | 3-6,7-5,8-10 |