Roberto Mancini is fuming after Sergio Aguero was ruled out of Saturday's crucial Barclays Premier League game against Sunderland with a severely blistered foot.

The Manchester City boss left people bemused yesterday when he said his star striker suffered a 'stupid' injury.

Neither Mancini or anybody at City would add further detail but it is understood that Aguero had a reaction when a spray was applied to his foot after he took a knock in the recent 2-1 victory over Chelsea.

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Source: Daily Mail