Juventus defender Lucio looks set for a lengthy period on the sidelines after tearing ankle ligaments in training on Friday.
The 34-year-old Brazilian suffered the injury during the Bianconeri's final practice session ahead of yesterday's Serie A opener against Parma, with subsequent tests confirming the worst.
"Lucio has undergone medical tests after twisting his right ankle in training on Friday," read a medical update from the club.
"The X-ray and MRI scans, which were conducted on Saturday morning, have revealed a complete tear of the defender's anterior talofibular ligament."
Lucio moved to the Turin club last month after his contract with Inter Milan was cancelled by mutual consent.
Juve began the defence of its Serie A title with a 2-0 home win over Parma yesterday.
Napoli president Aurelio De Laurentiis has defended the departure of coach Walter Mazzarri, saying 'you need two people to make a marriage'.