Roma have received a boost with the news that Juan will be fit to travel to Catania, but goalkeeper Alexander Doni is still a doubt.
The Giallorossi know that they must win at the Stadio Massimino and hope for Inter to slip up against Parma if they are to pull off a magnificent comeback and steal the Scudetto.
Influential defender Juan has been struggling with a knee problem for over a month and has been absent in recent weeks.
However, the Brazilian star seems to have shrugged off the complaint and took part in training this afternoon.
Fellow stopper Philippe Mexes has also been in doubt with a swollen knee, but the Frenchman also seems to have recovered.
Ludovic Giuly and Mirko Vucinic have fought off muscular pain and Daniele De Rossi is also ready for Catania.
However, goalkeeper Doni, who has been an important figure this term, is still experiencing quite severe pain in his shoulder.
Luciano Spalletti is expected to hand the 28-year-old the gloves in Sicily, but replacement Gianluca Curci is on standby.
A large group of fans gathered outside Trigoria today to cheer their heroes ahead of this weekends D-day.