Paris Saint-Germain manager Laurent Blanc has sought to play down injury concerns about Blaise Matuidi but conceded that he has to be worried about the midfielder's chances of playing against Chelsea next week.
Matuidi, 28, will undergo tests on Thursday to investigate the suspected hamstring problem that forced him off in PSG's 3-1 Coupe de France quarterfinal victory at St Etienne on Wednesday.
The France international was replaced by Benjamin Stambouli midway through the second half before the defending champions saw off his former club to set up a meeting with Lorient in the last four.
Speaking after the game, Blanc did his best to play down fears that Matuidi could miss PSG's Champions League round-of-16 second-leg game against Chelsea on Wednesday.
"I took him off as a precaution because he felt a pain behind his leg," he said. "We'll see tomorrow [Thursday].
"I'm not worried for the second leg against Chelsea in the Champions League -- but I'm lying to you when I say that. Because when a player leaves the pitch with an injury, I'm always worried."
PSG will travel to London next week with a 2-1 lead after Edinson Cavani scored a late winner in the first leg at the Parc des Princes on Feb. 16.
The French champions lost their first league match all season at Lyon and captain Thiago Silva was happy to see them return to form ahead of Saturday's Ligue 1 game against Montpellier.
"It's good to win again," the Brazilian said. "We're not going to forget the match we played at Lyon. We didn't play well ... but it was better today. We concentrated.
"We're ready for Chelsea. I think that everyone is aware of what awaits us over there. We're going to try to play our game.
"I hope that [Matuidi] can play because he's an important player for the team. Montpellier will be a difficult match because we will be thinking about the Chelsea game."