CHELSEA have been warned they can't take Championship outfit Leicester City lightly tomorrow – or else.

The Blues host the Foxes in the FA Cup quarter-finals at Stamford Bridge hot on the heels of their Champions League exploits against Napoli in midweek.

However, former Chelsea midfielder Craig Burley knows only too well the task former team-mate Robbie Di Matteo and his side face.

The Scot, who made almost 150 appearances during his eight-year stint at the Bridge, was a member of the Blues team who were dumped out of the FA Cup on penalties by Millwall in 1995, and also ran close by lowly Barnet a year earlier before winning the replay.

And he insists Chelsea could be in for a shock if they think Leicester will be pushovers.

“On paper it's a game they should win,” said Burley, “but there's always a story and Chelsea have got to make sure it's not them.

“Anything other than a win is not acceptable. They huffed and puffed past Portsmouth and struggled against Birmingham over two games.

“Sub-consciously you know you're better players and better quality and switch off. It's a mental thing. But sometimes it can come back and bit you on your backside.”

ESPN will televise live coverage of the FA Cup Sixth Round game between Chelsea and Leicester City on Sunday at 2pm. Visit  ESPN.co.uk/tv  for details