Khan: I'm better than ever

Amir Khan is confident he will show the world how much he has improved in his year out of the ring when he goes toe-to-toe with tricky southpaw Luis Collazo in Las Vegas on May 3.

The Bolton fighter had been hoping to take on Floyd Mayweather but will instead fight on his undercard after the American decided to fight Argentinian bruiser Marcos Maidana.