After Chelsea lost 2-1 at Newcastle United, Manchester City had the chance to cut the gap at the top of the Premier League to just three points when they met Everton.
City were returning to top form ahead of the fixture, spearheaded by the stunning purple patch of striker Sergio Aguero, who has been banging the goals in of late.
However, their hopes of winning the game were dealt a huge blow when the Argentine hitman was substituted after just seven minutes, as he pulled up with what looked like yet another muscle injury, and left the field in tears.
City had to put the disappointment behind them and kick on, and on 24 minutes they made the breakthrough, as Phil Jagielka fouled his England team mate James Milner inside the area, leaving Yaya Toure to score from the penalty spot.
City had 19 shots on goal but managed to get only three on target, whilst Everton's best chance fell to Romelu Lukaku, but Joe Hart kept him at bay.
The Toffees continue to be wildly inconsistent this season, and sit seven points off the top four, whilst City did their job - winning the game, piling the pressure on Chelsea in the process.