Stadium: Hard Court Central Round: 26 Ground: Hardcourt outdoor
| ITF M15 - Heraklion | 2021/05/25 08:00 | Luke Johnson v Billy Harris | 3-6,7-6,6-1 |
| ITF M15 - Heraklion | 2021/05/20 06:30 | Luke Johnson v Ryan Peniston | 6-7,3-6 |
| ITF M15 - Heraklion | 2021/05/19 09:40 | Matthew Dellavedova v Luke Johnson | 5-7,2-6 |
| ITF M15 - Troisdorf | 2021/05/13 09:00 | Yannick Mertens v Luke Johnson | 7-6,6-4 |
| ITF M15 - Troisdorf | 2021/05/12 11:55 | Luke Johnson v Nikolas Walterscheid-Tukic | 1-6,6-4,6-4 |
| ITF M15 - Troisdorf | 2021/05/11 08:00 | Luke Johnson v Gian Luca Tanner | 6-7,7-5,11-9 |
| ITF M15 - Troisdorf | 2021/05/10 08:00 | Luke Johnson v Caspar Schuetze | 6-2,6-2 |
| ITF M15 - Troisdorf | 2021/05/09 08:00 | Luke Johnson v Mats Hermans | 6-1,6-4 |
| ITF M15 - Heraklion | 2021/05/26 10:10 | Harry Wendelken v Pablo Vivero Gonzalez | 6-4,6-1 |
| ITF M15 - Heraklion | 2021/05/25 06:30 | Runhao Hua v Harry Wendelken | 6-2,6-1 |
| ITF M15 - Heraklion | 2021/05/23 06:30 | Ioannis Papounidis v Harry Wendelken | 6-4,3-6,3-10 |
| ITF M15 - Monastir | 2021/05/04 08:00 | Zachary Svajda v Harry Wendelken | 7-5,6-1 |
| ITF M15 - Monastir | 2021/05/03 12:00 | Miguel Fernando Pereira v Harry Wendelken | 6-7,5-7 |
| ITF M15 - Monastir | 2021/05/02 10:30 | Taketo Takamisawa v Harry Wendelken | 1-6,4-6 |
| ITF M15 - Monastir | 2021/04/26 12:30 | Remy Bertola v Harry Wendelken | 6-4,3-6,10-5 |
| ITF M15 - Monastir | 2021/04/26 08:00 | Osgar O'Hoisin v Harry Wendelken | 6-4,4-6,7-10 |