Mario Alberto Santana could miss the rest of the season and is certainly out of Fiorentina's clash with Juventus.
The Argentine pulled up during training and initial tests suggest a ‘significant' thigh strain.
It's entirely likely Santana could have played his final match of the current campaign, as this type of injury usually requires four to six weeks on the sidelines.
Adrian Mutu returns from suspension to partner Alberto Gilardino, but in Santana's absence it's possible Alessio Cerci will be given a rare starting spot on Sunday.
Think you know your Italian football? Share your knowledge, tips and comments to win cash prizes in OLBG's tipster competition - £11,000 to be won monthly!