The bout being billed as the richest in boxing history, the World Boxing Organisation welterweight title fight between Floyd Mayweather Jr and Manny Pacquiao, appears to be off.
Pacquiao's promoter Bob Arum says there'll be no fight in Las Vegas on March 13 because of Mayweather's demands for Olympic-style dope testing procedures.
The Filipino champion Pacquiao had agreed to have blood taken for testing before the initial media conference and after the fight but wouldn't agree to having it done within 30 days of the bout.
Mayweather's camp has called for random blood and urine sampling before and after the fight as mandated by the US Anti Doping Agency.
Arum's suggested the testing demands are the American's way of ducking the fight.