Stadium: Court 2 Round: 19 Ground: Clay
| Challenger Lille | 2021/03/23 10:45 | Matteo Martineau v Nicola Kuhn | 3-6,2-6 |
| 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 | 2021/05/02 12:40 | Quentin Halys v Nicola Kuhn | 6-7,2-6 |
| Challenger Aix en Provence | 2021/06/14 14:35 | Roberto Carballes Baena v Matteo Martineau | 6-3,6-1 |
| Challenger Lyon | 2021/06/08 11:35 | Matteo Martineau v Tomas Martin Etcheverry | 4-6,2-6 |
| French Open | 2021/05/24 11:55 | Matteo Martineau v Dmitry Popko | 6-7,6-4,4-6 |
| ITF M15 Majadahonda | 2021/05/08 08:00 | Nuno Borges v Matteo Martineau | 6-4,6-2 |
| ITF M15 Majadahonda | 2021/05/07 11:35 | Matteo Martineau v Alex Rybakov | 6-4,5-7,7-6 |
| ITF M15 Majadahonda | 2021/05/06 10:40 | Matteo Martineau v Sebastian Fanselow | 6-1,7-6 |
| ITF M15 Majadahonda | 2021/05/04 09:40 | Matteo Martineau v Pedro Boscardin Dias | 6-1,6-0 |
| ITF M25 Angers | 2021/04/21 09:30 | Matteo Martineau v Lucas Catarina | 6-7,2-6 |