Mayweather, McGregor fuel rumors of MMA bout with Twitter jabs

Warning: Story contains coarse language

While there's yet to be any sort of official word about Floyd Mayweather and Conor McGregor meeting in the Octagon, both fighters may be getting a head start on the promotional tour.

Related: McGregor-Mayweather rematch only happens in MMA, says White

Mayweather first posted a photoshopped image on social media early Sunday morning, in which he bloodies McGregor with a vicious elbow as both fighters wear Mayweather-branded "The Money Team" MMA gloves.

His caption features the type of trash talk that helped build the popularity of their August 2017 boxing match.

McGregor responded with a picture of himself landing an elbow to the head of Nate Diaz in his victory at UFC 202 in August 2016, a five-round majority decision.

Related: Mayweather shares cryptic video of him stepping into Octagon