Amir Khan declared himself in perfect condition for his welterweight showdown against Devon Alexander in Las Vegas after weighing in bang on target on Friday night.

Both Khan and Alexander tipped the scales right on the 10st 7lbs limit for the fight, which will take place at the MGM Grand Garden Arena in Las Vegas.

Khan, quoted by the Daily Mail, said: "As I've been saying, I'm really comfortable now in this higher division. My weight's perfect and you'll see that my strength and power has grown."

Khan has been highly confident ahead of the fight, even allowing his thoughts to drift to a match-up against Floyd Mayweather which could follow a victory.

And at the weigh-in, he told Alexander: "I'm from England but I've got more fans than you in America. I'm going to win this in style."

His opponent responded: "You've got to say that, in your mind you know I'm going to beat you. You know you're already beaten."

Throughout his build-up to the fight, Khan had insisted he is only concerned with the immediate threat posed by former IBF champion Alexander.

But the 28-year-old Bolton native betrayed his true concerns when questioned over his ability to see off Alexander in explosive enough style to make the prospect of a future showdown with the self-styled 'Pretty Boy' Mayweather a reality.

Khan said: "I want the boxing fans around the world to demand a fight between me and Floyd - I want them to demand it when they see Amir Khan in such a good fight.

"They're going to be like, 'wow, he should fight Mayweather'. I don't just want it to happen, I want people demanding it. It's going to be a tough fight but I don't just want to win it, I want to win it in style."

Time will determine the extent of the mistake Khan made a year ago when he pulled out of a prospective showdown with the then IBF champion in the mistaken belief he had already landed a dream Mayweather bout.

Instead Mayweather chose to face former Khan foe Marcos Maidana, leaving Khan out in the cold, and he spent a 14-month absence from the ring before returning to outpoint Luis Collazo in May.

The prize for beating Alexander could be huge, and Khan insists his work with trainer Virgil Hunter has helped blend his natural inclination to attack with a more measured approach that should serve him well.

"I'm still going to be the fighter that I've always been but I'm just going to be smarter," added Khan. "When I put an attack together there has got to be a reason for it.

"You can be exciting and come forward and throw a lot of punches, but be careful at the same time. That's what Virgil has brought to the table - he has made me a fighter who understands everything I have to do in the ring."