Wolves boss Mick McCarthy admits they simply didn't turn up for yesterday's derby defeat at home to Birmingham City.
Lee Bowyer settled matters with a clever chip from the edge of the Wolves box after good play by Christian Benitez.
McCarthy said: "I was not expecting us to play as poorly as we did in the first half.
"It was a hugely disappointing experience and we did not compete like we normally do.
"You expect to be beaten by Chelsea and Arsenal, as we have been in the last two games, but we expected to beat Birmingham.
"They deserved it, they were better than us on the day but we were 1-0 down before we had made a tackle and then it is always difficult.
"I can't blame the (4-0) defeat against Chelsea for what happened today. We were at home to Birmingham and didn't get the performance we wanted."