Swansea City defender Ashley Williams feels he's in the best form of his career.

The centre-half has been outstanding in the Premier League this season.

"I think I'm probably in the best form of my career," Williams told the Western Mail.

"I've never played at this level before and obviously I'm pleased I've been able to take what I was doing and the form I was showing in the Championship into a new division playing against some of the best players in the world.

"That was always my aim. My ambition was to get into the Premier League. Then it was about kicking on."