Juventus caretaker coach Angelo Alessio may have to do without Arturo Vidal for the derby clash with Torino after he suffered a muscle injury.
The midfielder picked up a knock at training earlier this week, and it is not yet known if he will be match fit in time for Saturday's encounter.
"Arturo Vidal pulled up in Tuesday's workout due to an overload in his adductor muscles," a statement on the Juventus website read.
"The Chilean midfielder's condition will be progressively monitored over the next few days."
Vidal, 25, has been a key figure for Juve so far this season, scoring nine goals in 18 appearances.
Meanwhile, Martin Caceres could also face a spell on the sidelines after sustaining an ankle injury in training.
"Martin Caceres missed out on Tuesday's double workout after reporting for training with a pain in his left ankle," the club said.
"The defender was given an MRI scan which displayed a notable joint effusion and a minimal ankle ligament strain. His recovery time will be assessed over the coming days."
Caceres joined Juve from Sevilla in January 2012 and has since become an important first-team member at Juventus Stadium.