And boss Mourinho said: "I cannot say this is the best squad I've ever started with.
"We have a good squad but there are a lot of other good squads in the Premier League.
"I don't say somebody is better than us but I also do not say we are better than the others."
Chelsea will set a new record of 64 unbeaten home league games if they avoid defeat against Birmingham tomorrow.
Mourinho said: "We will not celebrate if we draw as we play to win titles, not to break records."