Sunderland boss Sam Allardyce has slammed his Black Cats side for making it "really easy" for Chelsea, who ran out 3-1 winners at Stamford Bridge.
With new manager Guus Hiddink watching on from the stands, Chelsea raced into a 2-0 lead after less than 13 minutes, Branislav Ivanovic and Pedro scoring the goals.
Sunderland were rattled and produced a woeful 45 minutes, eventually losing 3-1 to leave them stranded in 19th spot in the Premier League ahead of Christmas.
Allardyce said: "I think we made it really easy for them, giving a goal away from a corner.
"That lifted their confidence and we then never competed in the areas we should have done.
"The more we gave them space, their confidence grew further.
"For me, it was really disappointing from my team to have played and performed like we did in the first half."
Allardyce withdrew Sebastian Coates after less than 25 minutes, Adam Johnson coming on with Sunderland switching to a flat-back four.
Allardyce added: "Change was needed even before half time to stop the flow of Chelsea, they were annihilating us.
"We were never getting out of our own half.
"The change needed to be made.
"Again, we have come out the second half and instead of playing our way in gave away a penalty.
"The only good thing was that we never lay down and died.
"We could have easily gone under, we didn't, we came back and started to create.
"Then we saw Chelsea a little nervous then, we created more chances but didn't look like getting a result from the start.
"It was very disappointing to see the team perform as they did."