Flat Addicks conceded their eighth goal in 100 minutes' play against Manchester City at The Valley, reported The Evening Standard.
"I've made quite a few changes since the Blackburn league game but it's not making any difference. Five weeks ago we left Stamford Bridge on a high, you couldn't legislate for what has happened to us since. Some hard work has to be done, and it starts as soon as I walk out of this room."
"Mick McCarthy, having watched that, will surely think he has got a chance next weekend. Sunderland are desperate, but we have got to turn this around against them and I hope we do."