Floyd Mayweather & Manny Pacquiao

*It appears as if the scheduled March 13 fight between Manny Pacquiao and Floyd Mayweather Jr. is off again after promoters failed to reach an agreement between the two camps over drug testing.

The World Boxing Organization welterweight title bout was thrown into doubt last month when Mayweather demanded Olympic-style dope testing, a request rejected by Pacquiao.

Mayweather’s camp had called for random blood and urine sampling prior to and after the proposed March 13 fight as mandated by the U.S. Anti Doping Agency. Pacquiao agreed to have blood taken for testing before the initial media conference and immediately after the fight but would not agree to have blood drawn within 30 days of the bout.

On Dec. 28, Arum said he would announce a new opponent for the Filipino southpaw but just hours later he backtracked, saying he would ask the boxer to reconsider his objection to blood testing.

Pacquiao (50-3-2) had been scheduled to defend the WBO title he won in November by stopping holder Miguel Cotto in the 12th round in Las Vegas.

While a fight with Pacman may be on ice, TMZ reported this week that Mayweather and his entourage were all too ready to throw down with rapper Rick Ross and his crew after they literally ran into each other at Diddy’s New Year’s Eve party in Las Vegas.

As the story goes, the two bumped into each other at some point during the event – which doubled as the grand opening celebration of Vanity nightclub. Heated words were exchanged between the two camps and things were about to get physical when Diddy reportedly stepped in to calm both sides down.