Assistant coach Ray Wilkins labelled a minority of Chelsea fans "out of order" after they hurled abuse at boss Luiz Felipe Scolari.
Chelsea have now dropped 16 points at home this season and they slipped to fourth place in the Barclays Premier League after their goalless draw against hard-working Hull. A section of the Stamford Bridge crowd chanted 'You don't know what you're doing' when Scolari replaced Ricardo Quaresma with Didier Drogba in the second half.
But Wilkins said: "To say someone does not know what he is doing when he has achieved what he has in the game, is a tad out of order."
He added: "It is never very pleasant whatever ground you are at. He clearly does know what he is doing. He has been in the game a hell of a long time and won a lot of trophies as well. So, from that aspect it is quite disappointing.
"The substitutions are always to try and improve things on the pitch, so that is why we did it."
The only saving grace for Scolari, according to Wilkins, is that he probably would not have understood what the Chelsea fans were chanting.
And the former England midfielder insists he has no plans to inform the Brazilian.
"When crowds are chanting I don't think managers from foreign countries understand what is being said," added Wilkins. "He would not have understood that. I certainly won't tell him because it is unnecessary. I don't think it should be heard around our stadium."
Chelsea's poor home form is almost certain to cost them the title this season but Wilkins is adamant they will not give up the fight until it is mathematically beyond them.
"Every game is vitally important for us now," admitted Wilkins. "Hopefully we will turn the corner. You cannot give up on the title when you see the talent that we've got within the club."
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