Stadium: Court 11 Round: 25 Ground: Clay
| Challenger Porto | 2021/06/29 12:50 | Nicola Kuhn v Emilio Gomez | 5-7,2-6 |
| ATP Mallorca | 2021/06/21 17:10 | Nicola Kuhn v Feliciano Lopez | 1-6,6-7 |
| ATP Mallorca | 2021/06/20 11:30 | Radu Albot v Nicola Kuhn | 6-7,4-6 |
| ATP Mallorca | 2021/06/19 09:00 | Nicola Kuhn v Pedro Martinez | 6-2,6-2 |
| ATP Halle | 2021/06/12 10:15 | Nicola Kuhn v Daniel Elahi Galan | 6-7,6-4,6-7 |
| Challenger Biella | 2021/05/30 09:00 | Nicola Kuhn v Jacopo Berrettini | 4-6,3-6 |
| Challenger Heilbronn | 2021/05/09 10:00 | Joao Menezes v Nicola Kuhn | 6-1,6-4 |
| Challenger Biella | 2021/05/03 10:15 | Nicola Kuhn v Felipe Meligeni Rodrigues Alves | 2-6,4-6 |
| Challenger Biella | 2021/05/17 08:00 | Mischa Zverev v Omar Giacalone | 6-7,2-6 |
| Challenger Biella | 2021/05/16 09:00 | Mischa Zverev v Geoffrey Blancaneaux | 6-2,6-0 |
| ITF M25 Prague | 2021/05/12 07:30 | Mischa Zverev v Peter Goldsteiner | 7-6,5-7,6-1 |
| ATP Munich | 2021/04/24 11:00 | Mischa Zverev v Daniel Elahi Galan | 3-6,3-6 |
| ATP Monte Carlo | 2021/04/10 10:20 | Mischa Zverev v Juan Ignacio Londero | 4-6,1-6 |
| Challenger Oeiras | 2021/04/08 13:00 | Mischa Zverev v Tiago Cacao | 3-6,6-1,6-7 |
| ATP Miami | 2021/03/24 18:55 | James Duckworth v Mischa Zverev | 6-2,4-6,6-4 |
| ATP Miami | 2021/03/23 18:10 | Matteo Viola v Mischa Zverev | 7-6,4-6,1-6 |