Stadium: Court 3 Round: 62 Ground: Clay
| ITF M25 Montauban | 2021/06/21 13:00 | Thibault Verdier v Lukas H Lilleengen | 6-7,6-2,10-8 |
| ITF M25 Grasse | 2021/06/14 16:15 | Jurgen Briand v Lukas H Lilleengen | 6-1,7-6 |
| ITF M25 Grasse | 2021/06/14 11:40 | Lukas H Lilleengen v Pierre Delage | 7-5,7-5 |
| ITF M25 Grasse | 2021/06/13 14:55 | Alexandre Aubriot v Lukas H Lilleengen | 3-6,0-6 |
| ITF M15 Helsinki | 2021/05/31 07:00 | Max Westphal v Lukas H Lilleengen | 6-0,5-7,10-7 |
| ITF M15 Antalya | 2021/05/10 07:00 | Edoardo Eremin v Lukas H Lilleengen | 6-0,6-3 |
| ITF M15 Antalya | 2021/05/09 07:00 | Lukas H Lilleengen v Franco Roncadelli | 6-4,6-3 |
| ITF M15 Antalya | 2021/05/03 07:00 | Mick Veldheer v Lukas H Lilleengen | 6-1,6-1 |
| ITF M15 Sofia | 2021/07/07 08:50 | Mattia Frinzi v Gabriel Donev | 5-7,2-6 |
| ITF M15 Sofia | 2021/07/05 12:00 | Mattia Frinzi v Aristotelis Thanos | 7-5,2-6,7-10 |
| ITF M15 Sofia | 2021/07/05 07:00 | Mattia Frinzi v Tommaso Compagnucci | 6-7,7-5,11-9 |
| ITF M15 Sofia | 2021/07/04 06:30 | Mattia Frinzi v Menelaos Efstathiou | 6-2,6-3 |
| ITF M15 Gaiba | 2021/06/11 11:55 | Mattia Frinzi v Antoine Bellier | 3-6,5-7 |
| ITF M15 Gaiba | 2021/06/10 10:45 | Cristian Rodriguez v Mattia Frinzi | 3-6,2-6 |
| ITF M15 Gaiba | 2021/06/09 14:45 | Lorenzo Rottoli v Mattia Frinzi | 3-6,1-6 |
| ITF M15 Gaiba | 2021/06/08 10:30 | Mattia Frinzi v Alessandro Ragazzi | 6-4,6-2 |