Stadium: Court 2 Round: 26 Ground: Clay
| Challenger Zadar | 2021/03/21 11:05 | Duje Kekez v Skander Mansouri | 6-7,4-6 |
| ITF M15 Sarajevo | 2021/06/02 09:00 | Skander Mansouri v Toby Martin | 6-4,6-2 |
| Challenger Salinas 2 | 2021/04/29 15:00 | Nicolas Mejia v Skander Mansouri | 3-6,6-3,6-2 |
| Challenger Salinas 2 | 2021/04/27 20:00 | Skander Mansouri v Joao Menezes | 6-7,6-4,7-6 |
| Challenger Salinas | 2021/04/20 14:30 | Skander Mansouri v Mohamed Aziz Dougaz | 2-6,2-6 |
| Challenger Zadar | 2021/03/22 11:15 | Nikolas Sanchez Izquierdo v Skander Mansouri | 6-2,6-1 |
| Challenger Zadar | 2021/03/21 11:05 | Duje Kekez v Skander Mansouri | 6-7,4-6 |
| Challenger St. Petersburg | 2021/03/01 08:30 | Artem Dubrivnyy v Skander Mansouri | 4-6,7-6,6-0 |
| Challenger St. Petersburg | 2021/02/28 09:10 | Daniil Glinka v Skander Mansouri | 6-3,6-7,5-7 |
| ITF M15 Sarajevo | 2021/06/02 09:00 | Duje Kekez v Sebastian Prechtel | 6-1,6-1 |
| ITF M25 Kiseljak | 2021/05/25 13:05 | Sebastian Prechtel v Duje Kekez | 3-6,6-3,6-4 |
| ITF M15 Sibenik | 2021/05/19 17:55 | Duje Kekez v Dan Added | 0-6,0-6 |
| ITF M15 Sibenik | 2021/05/18 08:30 | Duje Kekez v Julien Penzlin | 6-3,6-2 |
| ITF M15 Sibenik | 2021/05/17 10:25 | Duje Kekez v Admir Kalender | 6-4,0-6,10-8 |
| ITF M15 Sibenik | 2021/05/16 10:00 | Duje Kekez v Matic Dimic | 6-2,6-0 |
| ITF M15 Prijedor | 2021/05/11 09:50 | Duje Kekez v Federico Campana | 4-6,6-0,7-10 |
| ITF M15 Prijedor | 2021/05/10 13:30 | Duje Kekez v Valentin Lapalu | 6-4,6-4 |