Amir Khan left boxing fans in hysterics on Monday night when he called out Floyd Mayweather on Twitter.It seems like a pretty lame attempt at securing a huge payday from Khan, who hasn’t fought since his loss to Canelo Alvarez in May 2016.But Khan wants Mayweather to come out of retirement again to meet him in the ring - and he thinks he stands a chance.“I know it’s been a year I’ve not fought due to hand surgery. I’m ready to make comeback at 30 years of age,” Khan wrote.“Say what you like, Canelo was getting out boxed. I was winning on cards. He had power and caught me with a huge right.“That’s boxing. Mayweather doesn’t have the power.”

No, but what Mayweather does have is enough talent to win 50 fights, including one against Alvarez in 2013.

The American defeated UFC star Conor McGregor in August to make it 50-0, before confirming that he’s done with boxing for good.

Khan called Mayweather out in 2014

This isn’t the first time that Khan has called ‘Money’ out.

Back in 2014, the former unified light-welterweight world champion extended his record to 30-3 with a victory over American Devon Alexander via unanimous decision.

Khan retained his WBC Silver welterweight title with the win and then went about calling Mayweather out on Twitter - even giving TBE a proposed date for their bout.

“May 2nd 2015 @FloydMayweather Lets Go! #Ak47-1,” Khan tweeted on December 14, 2014.

The ‘Ak47-1’ hashtag is in reference to Mayweather’s record of 47-0 at the time, with Khan hoping to make that 47-1.

How Mayweather responded

It remains to be seen whether Mayweather even bothers to respond to Khan this time around, but he did three years ago.

The boxer, regarded by many as the greatest pound-for-pound fighter in history, dismissed Khan’s challenge, saying “nobody knows who Amir Khan is”.

“Khan should make a name for himself,” Mayweather said, per gmanetwork.com.

“Right now nobody knows who Amir Khan is, only boxing people. I think he should wait a bit.”

It would appear that Khan, who has had a troubled 2017 due to injuries and personal issues, has missed the boat on a lucrative fight with Mayweather.