There are defining moments in every season and the winning goal scored by Manchester City's Sergio Agüero against Villarreal last Tuesday is one of them for 2011-12.
A disappointing home draw was suddenly a memorable Champions League victory and the wild celebration by Roberto Mancini, who is usually coolness personified, told the tale.
Instead of going into Sunday's derby against Manchester United on the back of a result that would have left Champions League qualification in the balance, City's mood and confidence was raised several notches by the Argentine's strike.
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