Chelsea boss Carlo Ancelotti is calling for crisis talks after their thumping by Sunderland.
The midweek international friendlies mean the Italian will have to wait to point out where his players went wrong, but he is keen to work out why the Blues performed so poorly.
"We have to have a meeting about this on Thursday when they come back from the international break to look at what happened," Ancelotti said.
"I think this was the worst performance since I've been here. The performance was poor today, but in football it can happen if you're not at your best and don't play with your best mentality.
"All the things were wrong. We didn't play how we wanted to, Sunderland showed fantastic spirit and played better.
"We were not able to come back into the game. It was a bad day. We were not able to play our football for 90 minutes, just 15 minutes in the first half."
