City’s fourth straight league win leaves Manuel Pellegrini’s men breathing down Chelsea’s neck five weeks after finding themselves 11 points behind the Premier League leaders.
But victory came at a cost.
They will already be without suspended midfielder Toure for Wednesday’s crucial Champions League tie at Roma, while captain Vincent Kompany is struggling with a hamstring injury and David Silva is recovering from a knee problem.
Now Aguero may be missing after the Premier League’s top scorer limped off against Everton.
The mood of the City fans inside the Etihad had been boisterous after Newcastle had earlier ended Chelsea’s unbeaten start to the campaign but that changed when the Argentine striker was left clutching his knee.
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