Manchester City manager Roberto Mancini was forced to admit his own mistakes following the 1-0 defeat to Everton last night.
The Citizens were undone by a deflected Darron Gibson strike during the second period, with the former Manchester United midfielder blowing the title race wide open and allowing his old side to close the gap at the top of the Premier League to goal difference.
Tottenham Hotspur also took advantage with their victory against Wigan Athletic, and Mancini made the revelation post-match that he under-estimated the challenge of David Moyes' side on a cold night at Goodison Park.
"I didn't prepare well for this game. I thought it was maybe easier. I know here it is never easy, never," said the Italian at full-time.
"I acknowledge my mistake. It is important for me to know this because, like this, I can't do the same mistakes in the next game. The players put everything on the pitch but I made some mistakes during the last three days preparing for this game.
"I didn't prepare very well. For this reason we lost this game but I also feel we didn't deserve it because they had two chances to score and we were so unlucky in the same situation."
Counterpart Moyes would care little for the attitude brought to Merseyside by Mancini, and was instead left to revel in one of the best wins during his reign in charge of the Toffees.
The result was the Scot's 150th win in the Premier League as manager of Everton, and he was quick to pay tribute to his players for the fighting spirit shown despite having a number of key players out of action.
"That is as good as it has been at Everton for a long time With the team we had out, the players we had missing, it says a lot about the club and how we always seem to come back to do it," said Moyes post-match.
"We might have played smoother football and been better, but against the side we were playing against tonight, the players deserve a lot of credit.
"Man City are a terrific team. We had to defend for long periods, especially in the second half."