Watch Northampton Town vs Cheltenham Town Live Streaming
Watch Northampton Town vs Cheltenham Town Live StreamingThe keeper was carried off in the second half of the 2-1 loss after damaging his calf when collecting a cross.
The Czech Republic international underwent further scans on the injury yesterday and the club confirmed last night Cech will be out of action for up to a month.
It means he will miss tomorrow's clash with Manchester City at Stamford Bridge and the return leg against Inter on March 16.
It is a bitter blow for Chelsea as they continue to battle for glory in the Barclays Premier League, Europe and the FA Cup.
But England midfielder Lampard, while admitting Cech's absence will be a "huge blow" for Carlo Ancelotti's side, is convinced deputy Hilario is the perfect replacement.
"It is a huge blow to lose Petr," admitted Lampard. "He has been in fantastic form as everyone knows and he has always been up there with the best in the world and no-one wants to lose that.
