Stadium: Court 1 Round: 62 Ground: Hardcourt outdoor
| ITF M15 St Petersburg | 2021/02/10 08:35 | Vladimir Ivanov v Andrea Guerrieri | 6-4,6-2 |
| ITF M15 St Petersburg | 2021/02/08 07:00 | Andrea Guerrieri v Alexandr Binda | 6-0,7-6 |
| ITF M15 St Petersburg Qual | 2021/02/07 07:00 | Andrea Guerrieri v Bogdan Seleznev | 6-2,6-1 |
| ITF M15 St Petersburg | 2021/02/03 07:00 | Vladimir Ivanov v Andrea Guerrieri | 6-4,7-5 |
| ITF M15 St Petersburg | 2021/02/01 07:00 | Andrea Guerrieri v Egor Noskin | 6-3,6-4 |
| ITF M15 St Petersburg | 2021/01/31 07:00 | Andrea Guerrieri v Alexander Ovcharov | 6-2,6-1 |
| ITF M25 Trento | 2020/02/25 13:15 | Andrea Guerrieri v Alexander Erler | 3-6,6-3,4-6 |
| ITF M15 Monastir | 2020/02/06 13:15 | Andrea Guerrieri v Lucas Catarina | 4-6,5-7 |
| ITF M15 Monastir | 2021/04/05 09:00 | Fons Van Sambeek v Lukas H Lilleengen | 6-2,7-5 |
| ITF M15 Poitiers | 2021/03/14 14:05 | Raphael Baltensperger v Lukas H Lilleengen | 6-3,6-2 |
| ITF M25 Vale Do Lobo | 2021/03/08 12:00 | Edouard Villoslada v Lukas H Lilleengen | 6-4,4-6,10-8 |
| ITF M25 Vale Do Lobo | 2021/03/07 12:00 | Afonso Portugal v Lukas H Lilleengen | 2-6,2-6 |
| ITF M25 Faro | 2021/03/01 14:00 | Alexis Musialek v Lukas H Lilleengen | 6-3,6-2 |
| ITF M25 Faro | 2021/02/28 12:00 | Tiago Torres v Lukas H Lilleengen | 4-6,2-6 |
| ITF M25 Vale Do Lobo | 2021/02/24 13:30 | Max Andrews v Lukas H Lilleengen | 6-4,6-0 |
| ITF M25 Vale Do Lobo | 2021/02/23 14:30 | Vincent Stouff v Lukas H Lilleengen | 1-6,7-5,10-7 |