Roma medics are hoping to restore new signing Erik Lamela to full fitness by the end of September.
The summer signing from River Plate, who could eventually cost Roma a fee of around €17m, is currently sidelined with injury.
There were previous suggestions that the Argentine could be ready for Week 3 of the campaign, but that no longer seems possible.
Lamela is still struggling with a left ankle problem which he picked up for his country during the Under-20 World Cup.
The player is undergoing a specific rehabilitation programme which could see him return to Luis Enrique's disposal by the end of the month.