But McCarthy believes his side were denied a penalty in their 0-1 defeat at home.
Portsmouth defender Marc Wilson’s handball in the second half looked a certain penalty, but referee Howard Webb did not agree.
McCarthy told Sky Sports: “We’ve lost today because we didn’t do our jobs properly, let’s not blame anybody else.”
McCarthy added: “My players said it was a stone-wall penalty but my players would wouldn’t they? I’ve had a look at it and it looks like a good save to me.”