The Blues were left licking their wounds after a surprise 2-1 defeat in the Champions League to Porto.
And former United defender Ferdinand thinks Chelsea have a problem on their hands.
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Diego Costa reacts to a refereeing decision
"Chelsea lacked composure. There was no real leadership," Ferdinand told BT Sport.
"You look back at past Mourinho sides.
"You had players like Terry, Lampard and Drogba.
"Players that other players could look to that could help them.
"I didn't see that tonight and didn't see players that could stand up and be counted.
"They have a lot of work to do to get out of this group."
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Jose Mourinho was left frustrated by Chelsea's display
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Rio Ferdinand thinks Chelsea desperately miss strong leaders