Boxing's pound-for-pound top two have decided on the MGM Grand in Las Vegas as both parties try to make the biggest fight the sport has seen in three decades.

For the richest fight in history to still happen, rival American broadcasting channels Showtime and HBO must now reach a deal as to which - perhaps both of them - will screen the fight.

Pacquiao, who has signed to be a judge in the Miss Universe contest, is likely to get the shorter end of a 60-40 purse split after American Mayweather last month declared he wanted to face the Filipino next.