Adding fuel to an already fiery scenario is Nate Diaz, a fighter notorious for his competitive history with McGregor. Emerging from a recent victory over Jorge Masvidal in a boxing bout, Diaz has sent a challenge to the Irishman. Taking to social media (below), Diaz set out the challenge: "I box Crawford and fight Conor next 168 Ifg."

Terence Crawford vs. Conor McGregor was once on the table. Both parties confirmed a phone call about a two-fight series, one in boxing and one in mixed martial arts, but Crawford says that it's not happening.

Terence Crawford, the boxing champion, turned down a two-fight deal with Conor McGregor because it would have required they fight once in the Octagon.