Stadium: Court 2 Round: 25 Ground: Clay
| ITF M15 St Petersburg Qual | 2021/04/11 09:20 | Sarp Agabigun v Mert Alkaya | 6-4,6-3 |
| ITF M15 St Petersburg | 2021/04/04 08:25 | Yanki Erel v Mert Alkaya | 6-1,7-5 |
| ITF M15 Antalya | 2021/03/07 07:00 | Nicolae Frunza v Mert Alkaya | 6-4,6-0 |
| ITF M15 Antalya | 2021/02/16 07:00 | Sidane Pontjodikromo v Mert Alkaya | 6-3,6-0 |
| ITF M15 Antalya | 2021/01/20 11:15 | Mert Alkaya v Facundo Juarez | 5-7,3-6 |
| ITF M15 Antalya | 2021/01/12 09:00 | Felix Corwin v Mert Alkaya | 6-4,6-4 |
| ITF M15 Antalya | 2020/12/07 07:00 | Mert Alkaya v Timur Kiyamov | 7-5,0-6,2-10 |
| ITF M15 Antalya | 2020/12/06 07:00 | Mert Alkaya v Gianluca Coloma-Heck | 2-6,6-2,10-4 |
| Challenger Prostejov | 2021/06/14 14:20 | Andrew Paulson v Hugo Dellien | 1-6,3-6 |
| ITF M25 Most | 2021/05/27 07:55 | Gijs Brouwer v Andrew Paulson | 6-2,2-6,7-6 |
| ITF M25 Most | 2021/05/26 09:50 | Andrew Paulson v Christian Lindell | 6-2,6-3 |
| ITF M25 Jablonec Nad Nisou | 2021/05/21 09:00 | Andrew Paulson v Evan Furness | 0-6,3-6 |
| ITF M25 Jablonec Nad Nisou | 2021/05/20 07:55 | Andrew Paulson v Titouan Droguet | 6-4,6-2 |
| ITF M25 Jablonec Nad Nisou | 2021/05/19 08:00 | Jonas Forejtek v Andrew Paulson | 6-2,3-6,1-6 |
| ITF M25 Jablonec Nad Nisou | 2021/05/18 07:30 | Andrew Paulson v Kai Lemstra | 6-3,6-4 |
| ITF M25 Jablonec Nad Nisou | 2021/05/17 08:30 | Andrew Paulson v Leon Hoeveler | 6-1,6-2 |