Juventus defender Daniele Rugani is set for a spell on the sidelines due to injury.
The 22-year-old centre-back missed the 2-2 Serie A draw away to Atalanta on Friday and has now been diagnosed with a minor leg fracture.
"After reporting continued discomfort in his right knee, Daniele Rugani underwent a medical examination today which revealed a minor fracture to the head of his fibula," a club statement read.
"The extent of the injury and the defender's condition will continue to be monitored in the coming days."
Title-holders Juve lead Serie A by nine points from Roma as they aim to secure an unprecedented sixth successive Scudetto.
Massimiliano Allegri's team visit Monaco in the first leg of their Champions League semi-final on Wednesday, followed by a derby at home to Torino in the league on Saturday.