The former Liverpool midfielder has been restricted to two substitute appearances since joining the club over the northern summer as a result of the niggling injury but had been in line to start this weekend's Serie A match against Catania.
But Fiorentina confirmed the problem that has disrupted the start of Aquilani's season will require more time to heal.
"ACF Fiorentina announces that
"The specialist found no significant changes, but suggested, however, treatment for another two weeks."
Mario Balotelli has insisted he is happy to have put his time in England behind him.