Floyd Mayweather Jr. is reportedly set to return to the ring to take on UFC’s biggest superstar, Conor McGregor in a billion-dollar boxing match in Las Vegas. According to The Sun, the two parties are in the final stages of negotiations for a boxing match. The self-proclaimed best ever, Mayweather was widely-recognized as the best pound-for-pound fighter in the world before hanging up the gloves last September. Mayweather is set to come out of retirement for a purse upwards of $144 million. McGregor would earn over $10 million.