Derek McInnes felt his Aberdeen players had a hand in their own downfall after losing 3-0 to Rangers at Pittodrie.
The Dons, chasing an 11th straight home win, were on top in the second period until Rangers broke the deadlock against the run of play in the 79th minute.
McInnes said: “I thought we started the game better and although the latter part of the first half was a bit untidy, we looked comfortable throughout.
“But I wanted more from us in an attacking sense and I thought we produced that and were in complete charge of the game.
“Usually after around 70 minutes, you contemplate changes but I did not feel there was any real need because we were in control.
“But we need to concentrate against good players and that should be there for the full 90 minutes.”
McInnes added: “We lost a very poor goal, which can happen, but it was the response to losing that goal which was more disappointing because there was still plenty of time in the game to get back into it.
“We allowed a crazy four or five minutes to ultimately lose the game.”