Stadium: Court 17 Round: 62 Ground: Clay
| ITF M15 Cairo | 2021/09/19 10:30 | Karan Singh v Leyton Rivera | 6-2,6-3 |
| ITF M15 Cairo | 2021/09/12 07:00 | Nitin Kumar Sinha v Leyton Rivera | 7-5,6-2 |
| ITF M15 Zilina | 2021/08/31 07:30 | Paul Valsecchi v Leyton Rivera | 6-3,6-4 |
| ITF M15 Zilina | 2021/08/30 07:30 | Jan Jermar v Leyton Rivera | 6-7,3-6 |
| ITF M15 Bratislava | 2021/08/23 09:00 | Janos Fekete v Leyton Rivera | 6-2,7-5 |
| ITF M15 Bratislava | 2021/08/17 08:00 | Leyton Rivera v Tomas Lanik | 6-7,2-6 |
| ITF M15 Frederiksberg | 2021/08/04 09:25 | Ryan Nijboer v Leyton Rivera | 6-4,6-2 |
| ITF M15 Frederiksberg | 2021/08/02 11:05 | Nazim Makhlouf v Leyton Rivera | 3-6,6-3,3-10 |
| ITF M25 Prague | 2021/10/03 11:30 | Lukas Velik v Mark Havlicek | 4-6,6-3,10-7 |
| ITF M25 Budapest | 2021/09/29 07:25 | Mark Havlicek v Milos Karol | 2-6,7-6,4-6 |
| ITF M25 Budapest | 2021/09/27 14:25 | Mark Havlicek v Horst Rieder | 6-4,6-2 |
| ITF M25 Budapest | 2021/09/26 11:00 | Mark Havlicek v Jakub Katuch | 6-2,6-4 |
| ITF M25 Pardubice | 2021/09/23 07:30 | Mark Havlicek v Pavel Nejedly | 6-7,6-7 |
| ITF M25 Pardubice | 2021/09/21 09:30 | Tim Handel v Mark Havlicek | 7-5,6-1 |
| ITF M25 Pardubice | 2021/09/20 10:00 | Vitek Horak v Mark Havlicek | 6-7,3-6 |
| ITF M25 Ricany | 2021/08/31 08:00 | Jonas Forejtek v Mark Havlicek | 6-2,6-1 |