Chelsea goalkeeper Petr Cech will be out for at least a month after tearing a calf muscle in Wednesday night's 2-1 Champions League defeat by Inter Milan at the San Siro.
Cech was carried off on a stretcher in the second half after damaging his calf when collecting a cross.
The Czech Republic international underwent further scans on the injury and the club have now confirmed that Cech will be out for up to a month.
It means he will miss Saturday's clash with Manchester City at Stamford Bridge and the return leg against Inter Milan on March 16.
A spokesman for Chelsea said on Thursday: "Today's scans confirm that Petr Cech suffered a tear in a calf muscle in the Inter game. He is expected to be out for three to four weeks."
It is a bitter blow for Chelsea as they continue to battle for glory in the Barclays Premier League, the Champions League and the FA Cup.