Amir Khan will be hoping a win over Devon Alexander this weekend can land him a shot at Floyd Mayweather, but leading promoter Eddie Hearn has told him the smart cash is in a domestic grudge clash with Kell Brook.

Khan makes his Las Vegas bow this weekend against Alexander - a man Brook was slated to fight for a world title three times only for both men to withdraw with injuries.

No world strap is on the line on Saturday - Alexander lost to Shawn Porter who Brook then beat in August - but the winner could be in a line to face unbeaten American Mayweather next year.

It is a scrap Khan has long coveted but one Mayweather has so far found easy to resist, but a show-stopping display in Vegas could change that.

Hearn, though, says a sell-out at Wembley next summer is the way to go.

There is real animosity between Khan and Brook dating back years and, although Sheffield man Brook has a lower world profile, he does have a title.

"I want to see Amir Khan against Kell Brook," Hearn told Sky Sports News.

"Amir Khan is quoted this week saying 'on my terms, on this and on that', I don't care whose terms it's on, let's just get it made.

"Everyone wants to see it, it's a wonderful fight. Amir Khan is a bigger name than Kell Brook, Kell Brook is a champion of the world.

"It's very simple, Wembley Stadium, 80,000 in the summer for the IBF welterweight champion of the world.

"Talk about grudge matches... Amir has got to get past Devon Alexander first and I think he'll do that with style."

For Khan's promoter, Oscar de la Hoya, there is only one way his man is going, be it against Brook or otherwise.

"I love his spirit, they don't make them like that any more," he said on Sky Sports News.

"Amir Khan is dedicated, he takes his craft seriously, he's a throwback fighter. If Amir Khan had to fight every week, he would. He loves and enjoys boxing and he understands the seriousness of training and competing.

"He keeps bouncing back, he doesn't stay on the canvas and quit. He has the skill and he knows how to come back. He's not a quitter.

"Does he deserve the big fights? Absolutely."

Both fighters fronted up at a final press conference on Thursday and Khan spoke of achieving a dream by being there.

"My dream was always to fight in Vegas and I'm headlining; this is a dream come true," he said.

"I want to thank my trainers for working me hard, I have been pushing myself hard. I've had some great sparring and we are coming to fight and win.

"No more setbacks, I have lost in the past but have come back stronger.

"I am looking forward with no excuses and want to make a statement."

For his part, Alexander says he is ready to give the UK fans want they want - a knockout of Khan.

"I want to thank Amir Khan for taking the challenge, taking a legitimate challenge," he told a news conference.

"I don't know what it is about Khan but a lot off the UK fans want to see me beat him, so I don't know what's going on over there. I'm ready to do 15 rounds if I have to."