"I am disappointed we did not get more," was Calderwood's verdict after watching his side take the lead.
"We had them exactly where we wanted them for an away team in a derby and we should have done better.
"The talking points all happened in injury time, when it wasn't clear what was going off. I thought they had given us a free-kick, but he had actually given a penalty.
"That will go down in folklore, Lee Camp saving that penalty."