Juventus are sweating over the fitness of Alberto Aquilani after he pulled up with an injury against Genoa on Sunday.
The Italy international midfielder asked to be substituted after feeling a pain in his thigh.
"I preferred not to risk it," Aquilani said. "I felt a pain in the quadriceps.
"Seeing that Gigi Del Neri only had one change left, I tried to limit the damage.
"I hope it was only cramp.
"Tests will be carried out on Tuesday to ascertain the problem."