Stadium: Cancha 3 Round: 28 Ground: Clay
| Challenger Buenos Aires MD | 2021/10/21 20:30 | Casanova/Rodriguez Taverna v Duran/Tirante | 6-1,6-7,10-8 |
| Challenger Buenos Aires MD | 2021/10/19 20:00 | Casanova/Rodriguez Taverna v Collarini/Kestelboim | 6-2,7-6 |
| Challenger Buenos Aires MD | 2021/10/21 19:00 | Hardt/S Izquierdo v Kicker/Ugo Carabelli | 6-2,4-6,6-10 |
| Challenger Buenos Aires MD | 2021/10/21 00:45 | Kicker/Ugo Carabelli v Romboli/Zeballos | 7-5,6-0 |