Stadium: Central Round: 25 Ground: Hardcourt outdoor
| ITF M25 Grasse | 2021/06/15 08:00 | Lilian Marmousez v Bogdan Bobrov | 7-5,6-2 |
| ITF M15 Helsinki | 2021/06/06 06:00 | Lilian Marmousez v Kyrian Jacquet | 1-6,2-6 |
| ITF M15 Helsinki | 2021/06/05 07:00 | Lucas Catarina v Lilian Marmousez | 3-6,3-6 |
| ITF M15 Helsinki | 2021/06/04 07:00 | Lilian Marmousez v Bruno Kuzuhara | 6-4,7-6 |
| ITF M15 Helsinki | 2021/06/03 07:00 | Otto Virtanen v Lilian Marmousez | 5-7,6-1,4-6 |
| ITF M15 Helsinki | 2021/06/02 06:30 | Karl Kiur Saar v Lilian Marmousez | 2-6,4-6 |
| ITF M15 Las Palmas | 2021/04/27 08:00 | Lilian Marmousez v Francisco Andreu Garcia | 6-4,5-7,7-10 |
| ITF M15 Las Palmas | 2021/04/26 09:30 | Lilian Marmousez v Mehdi Sadaoui | 7-5,7-5 |