Stadium: Court 1 Round: 25 Ground: Hardcourt outdoor
| ITF M15 East Lansing | 2019/11/20 17:45 | Strong Kirchheimer v Keenan Mayo | 6-3,6-3 |
| ITF M25 Claremont | 2019/10/09 17:00 | Liam Broady v Keenan Mayo | 6-1,6-1 |
| ITF M25 Decatur | 2019/07/30 20:45 | Aleksandar Kovacevic v Keenan Mayo | 6-2,6-2 |
| ITF M25 Champaign | 2019/07/26 18:30 | Keenan Mayo v Jenson Brooksby | 4-6,1-6 |
| ITF M25 Champaign | 2019/07/25 17:00 | Keenan Mayo v Kareem Allaf | 7-5,6-7,7-5 |
| ITF M25 Champaign | 2019/07/23 18:30 | Keenan Mayo v Alexander Brown | 6-4,6-7,7-6 |
| ITF M15 Pittsburgh | 2019/07/03 14:00 | Keenan Mayo v Kyle Seelig | 3-6,6-4,6-7 |
| ITF M15 Orlando | 2019/06/20 13:00 | Keenan Mayo v Vasil Kirkov | 3-6,3-6 |
| ITF M15 Heraklion | 2020/11/25 07:30 | Markos Kalovelonis v Lucas Gerch | 2-6,2-6 |
| ITF M15 Heraklion | 2020/11/18 07:30 | Evan Furness v Markos Kalovelonis | 6-3,6-4 |
| ITF M15 Heraklion | 2020/11/12 11:00 | Luke Johnson v Markos Kalovelonis | 6-3,6-3 |
| ITF M15 Sharm El Sheikh | 2020/10/18 09:00 | Viacheslav Bielinskyi v Markos Kalovelonis | 4-6,7-6,10-8 |
| ITF M15 Sharm El Sheikh | 2020/10/12 09:00 | Markos Kalovelonis v Omni Kumar | 2-6,5-7 |
| ITF M15 Sharm El Sheikh | 2020/10/11 11:00 | Markos Kalovelonis v Sabit Suntic | 6-4,6-2 |
| ITF M15 Sharm El Sheikh | 2020/10/06 08:00 | Markos Kalovelonis v Daniele Capecchi | 1-6,3-6 |
| ITF M15 Heraklion | 2020/02/27 11:05 | Jordan Correia v Markos Kalovelonis | 7-5,6-0 |