The Manchester City captain had a great 2013, despite failing to lead his side to a second successive Premier League title.
He's been pivotal in the big games, always leading his team in terms of performance, notably against Manchester United in both games in 2013. His defending is outstanding and he's rarely beaten in the air. He's also improved his ball skills, as he's able to get out of sticky situations when he's under pressure.
The only word of caution for the future is that he must avoid becoming injury prone.