Chelsea captain Cesar Azpilicueta says they cannot afford to underestimate Manchester United today.

Caretaker manager Michael Carrick will be in charge for the game against the Blues after last Sunday's sacking of Ole Gunnar Soslkjaer.

Chelsea know all too well the feeling of replacing a club legend halfway through the season, having replaced Frank Lampard with Thomas Tuchel in January.

"In both cases, they are playing legends and they feel the club a lot and you want the best for your club," Azpilicueta told The Sun.

"Sometimes it works, and sometimes it doesn't.

"They were not good times [when Lampard was sacked]. We were in a bad position."