Stadium: Hard 21 Round: 25 Ground: Hardcourt outdoor
| ITF - M15 Héraklion | 2021/05/28 06:30 | Zhang, Ze v Johnson, Luke | 6-1,6-1 |
| ITF - M15 Héraklion | 2021/05/27 06:30 | Johnson, Luke v Harry Wendelken | 6-2,6-7,6-3 |
| ITF - M15 Héraklion | 2021/05/25 08:00 | Johnson, Luke v Billy Harris | 3-6,7-6,6-1 |
| ITF - M15 Héraklion | 2021/05/20 06:30 | Johnson, Luke v Ryan Peniston | 6-7,3-6 |
| ITF - M15 Héraklion | 2021/05/19 09:40 | Matthew Dellavedova v Johnson, Luke | 5-7,2-6 |
| ITF M15 Troisdorf | 2021/05/13 09:00 | Mertens, Yannick v Johnson, Luke | 7-6,6-4 |
| ITF M15 Troisdorf | 2021/05/12 11:55 | Johnson, Luke v Walterscheid-Tukic, Nikolas | 1-6,6-4,6-4 |
| ITF M15 Troisdorf | 2021/05/11 08:00 | Johnson, Luke v Tanner, Gian Luca | 6-7,7-5,11-9 |
| ITF - M15 Héraklion | 2021/06/01 06:30 | Mattia Bellucci v Uzhylovsky, Vladimir | 6-1,6-0 |
| ITF - M15 Héraklion | 2021/05/31 06:30 | Mattia Bellucci v Keisidis, Christos | 6-4,6-3 |
| ITF - M15 Héraklion | 2021/05/30 06:30 | Mattia Bellucci v Jimmy Yang | 6-2,7-6 |
| ITF - M15 Héraklion | 2021/05/25 06:30 | Mattia Bellucci v Griffith, William | 5-7,2-6 |
| ITF - M15 Héraklion | 2021/05/24 06:30 | Mattia Bellucci v George Houghton | 6-4,6-3 |
| ITF - M15 Héraklion | 2021/05/23 08:00 | Mattia Bellucci v Ansari, Austin Ansari | 6-4,7-5 |
| ITF M15 Troisdorf | 2021/05/12 09:00 | Dan Added v Mattia Bellucci | 4-6,6-4,7-6 |
| ITF M15 Troisdorf | 2021/05/11 09:25 | Remy Bertola v Mattia Bellucci | 4-6,2-6 |