Milan's Ignazio Abate is expected to be out for at least two weeks after suffering a thigh strain.
Abate, 25, reportedly told the club's coaching staff he felt some discomfort during the warm-up before the Champions League tie against Malaga, but Massimiliano Allegri decided to risk fielding him.
The full-back lasted just six minutes, and his absence will allow youngster Mattia De Sciglio a run in the side.
Having made his debut last season, De Sciglio, who has been given the number two shirt, has already put in some impressive displays due to a previous Abate injury.
Speaking at a sponsorship event on Thursday, the 20-year-old said: "I am sorry about Ignazio's injury as he is an important player, and hopefully he will recover soon. I now have the chance to play more, and I will look to give my all."