Trainer Freddie Roach insists Amir Khan is in prime condition ahead of his first defence of his WBA light-welterweight title.

Khan's career has taken a dramatic turn since last September, when some thought it was over after he was knocked out in the first round by Breidis Prescott.

However under Roach, Khan has returned to the ring a stronger fighter, with his defeat of Andriy Kotelnik on July 18 earning him the WBA light- welterweight title.

Roach told Sky Sports News: "He's in better shape, he is getting use to the weight and is much stronger than 140 pounds, that was the problem at 135 (pounds) - it killed him to make the weight.

"He is much more comfortable at 145, he is punching better and is 100 per cent right now."