Neil Lennon believes his side simply didn't turn up in the second half yesterday as they lost out in the first Old Firm clash of the season.
Despite going in at the break with a 2-1 lead, Lennon saw his Bhoys throw it away in what was a poor second half performance in which he believes his side simply didn't compete.
He spoke of his dissapointment afterwards, saying, "We had our tails up but were never really got going in the second half. We sat too deep.
"My midfield seemed to go missing and we didn't get anyone on the ball to get it up to the forward line, who looked a threat going forward at times.
When asked about the dismissal of Charlie Mulgrew, Lennon felt it was a soft one.
"He was treading a fine line on a couple of occasions. We told Charlie to keep his discipline but I thought he got the ball so I didn't think it was a sending off."
The Hoops will be looking to bounce back instantly when they take on Ross County in Dingwall on League Cup duty on Wednesday night.