The American boxer, who came out of retirement to beat the Irishman last year, has been called out by the undefeated Russian.
And Mayweather, 41, has responded by asking the companies that back him to put their hands in their pockets to make the fight happen.
On Twitter, the former five-weight world champion wrote: "CBS, Showtime and MGM Grand get the checkbook out.
"Go to @leonardellerbe's page to view Khabib Nurmagomedov challenging me."
Khabib, 30, called the American star out after he beat the Irish UFC star with a rear naked choke in the fourth-round.
He took his unbeaten record to 27-0 and retained his lightweight title before he leapt out of the cage to attack rival Dillon Danis.
Standing with Leonard Ellerbe, the CEO of Mayweather Promotions, Khabib said: "Hey let's go Floyd, we have to fight now.
"50 and 0 versus 27 and 0, two guys that never lose. Let's go, why not.
"Because in this jungle only one king, only one king."
Mayweather beat McGregor last year with a tenth-round stoppage, but the UFC star was still on his feet.
Khabib, who floored the Irish ace with a huge right hand in the second round at UFC 229, said he is the king because the American never managed to drop him.
The confident Russian added: "Of course I am the king. Because he [Mayweather] can not drop McGregor but I drop him easily."
Ellerbe then turned to the UFC star and added: "You'll get some of that work baby."
Source: Read Full Article