Thiago Silva could miss Paris Saint-Germain's Champions League quarter-final return leg at Barcelona next week, coach Carlo Ancelotti has said.
The Brazil international was one of several players - including David Beckham, Javier Pastore, Ezequiel Lavezzi and Lucas Moura - left out of the starting line-up for PSG's 2-0 victory at Rennes on Saturday afternoon.
However, Thiago Silva was not even included on the bench at the Stade de la Route de Lorient, and Ancelotti revealed the centre-back had sustained an injury during the 2-2 draw against Barcelona at the Parc des Princes.
"He sustained a blow to his knee on Tuesday," Ancelotti told the media. "That's why he was not here."
Asked if he would be available at the Camp Nou, the Italian added: "I don't know. We'll see. It's not very serious but we must wait."
Ancelotti was nonetheless pleased that his much-changed side maintained their seven-point advantage at the top of Ligue 1, with second-placed Marseille having beaten Bordeaux 1-0 on Friday.
"After the match against Barcelona, we knew that this meeting in Rennes would not be easy," Ancelotti said. "This match was important as Marseille won on Friday.
"I made some changes because I wanted a fresh team on the pitch. We played well for the first 60 minutes before having more difficulties in the last half-hour because of a lack of energy. This is a very important victory, which allows us to move a step closer to the title."