Chelsea goalkeeper Petr Cech says their heroics against Napoli must not be a one-off.

Cech reckons all this week's heroics will count for nothing unless Chelsea maintain that level of performance in their next four crucial games.

He said: "In the next two weeks we have the chance to reach the FA Cup semi-finals, third place in the Premier League and take a big step in the Champions League quarter-finals.

"One week ago, everything looked really bad for Chelsea but football is so crazy that it has all changed around.

"We won against Birmingham and Stoke and then came back from 3-1 down to beat Napoli and, suddenly, it all looks completely different for us.

"On Sunday, we play Leicester in the FA Cup, then we have two huge Premier League games against Manchester City and Tottenham before the first leg of the Champions League quarter-finals.

"We are still on track to do what we did in 2009 when we changed the manager in mid-season but, in two weeks' time, this season could look completely different again - in a good way or a bad one."