United clash real test - Di Matteo
Roberto Di Matteo has admitted it is crunch time for his new-look Chelsea side ahead of the showdown with Manchester United.
The European champions have stormed to the top of the Barclays Premier League this season with a new brand of attacking football.
But they are not quite the finished article, a stark reminder of which came during what was their first major setback of the season in Tuesday night's Champions League defeat at Shakhtar Donetsk.
"We've had a good start, but we need to show consistency over a long period of time," said Di Matteo, whose side are four points clear at the top of the table.
"We have a busy fixture list now coming up.So, it will be a test for us, a challenge for us, and it will also test the depth of our squad.
"The players that have come in have settled in quickly and that's been a big bonus for us, and I think thanks to the support as well from the club and from all the other team members that we already had here."