Adrien Broner
Broner joins Khan, Mayweather and Maidana on Las Vegas card.

Adrien Broner has joined Amir Khan on the undercard of Floyd Mayweather's Las Vegas showdown with Marcos Maidana after a meeting with Carlos Molina was confirmed.

Mayweather had initially called for Broner and Khan to meet in an eliminator as the chief support for his match, with the winner to be rewarded with a bout against the five weight world champion later this year.

But instead Khan will meet Luis Collazo in his first fight at welterweight level on a packed card that will now include 'The Problem' Broner, who will be making his debut at light-welterweight.

Broner, the self-appointed heir to Mayweather's throne, had been in contention to take on the unbeaten world champion until he was dominated by Maidana in his last match last December, losing on a unanimous points decision.

"I had a minor setback but I am back on May 3," Broner said. "Everybody needs to understand that I just took a loss. I haven't lost it. I'm still 'The Problem' anyone can get it, whether you are African, Puerto Rican, Dominican, Cuban or Mexican."

Molina will be appearing in his first fight for nearly 18 months when he steps into the ring with Broner after suffering a career first defeat to Khan in Los Angeles in December 2012.

"I am so excited to be able to fight on a card of this magnitude against Adrien Broner," Molina said. "Sure he's tough and we all saw what happened in his last fight when he was under pressure. I have the boxing ability and punching power to beat him and that is exactly what I plan to do."

Following the confirmation of his match with 32-year-old Collazo, a former opponent of Ricky Hatton, Khan made a beeline for Mayweather, indicating he still has eye on a meeting with the 37-year-old.

But despite already planning for the future, the Bolton-born fighter insists Collazo is top of his priorities.

"I'm not really going to get into all the hype of (a fight against Mayweather)," Khan told Boxing Scene. "If it happens, it happens. I'm just going to be focused on one thing. Even though it didn't happen last time, it's not going to affect me in any way. I'm just going to be focused on my next fight. I know I'm up against a tough guy."