Roma continue their attempts to lure Vincenzo Montella from Catania, but if problems continue then they could go back to Andre Villas Boas.
The Giallorossi have made it clear Montella is their first choice for the job, but Catania are so far refusing to release him from his contract.
According to La Gazzetta dello Sport, there are also issues with wages, as he would like €1.5m per season to return to the Olimpico, whereas the club is offering €1m.
It is reported that if the Montella situation is not resolved within 48 hours, Roma will move on to second choice Villas Boas.
The Portuguese tactician is out of work after Chelsea sacked him, but has also been linked with Liverpool.
Villas Boas was the original candidate to replace Luis Enrique and is said to be on stand-by for further developments.