URINE TESTS ORDERED FOR MAYWEATHER/PACQUIAO: Nevada hopes move will end standoff hampering scheduled March 13 fight.

      Each boxer must submit to the tests within 48 hours or face possible fines or suspension by the Nevada Athletic commission, reports the Associated Press.

      "That at least starts the ball rolling," said Keith Kizer, the commission's executive director.

      As previously reported, Mayweather's camp has accused Pacquiao of using steroids, and has demanded that the Filipino fighter submit to additional blood tests, which are necessary to find performance-enhancing drugs that may not be detected by urine tests alone.

      Mayweather backed off earlier on a demand for the tests to be conducted by the U.S. Anti-Doping Agency but has insisted all along that they be done randomly and include blood tests within 30 days before the fight, preferably two days before.

      Pacquiao argued that a blood test so close to a fight would weaken him in the ring. Mayweather's representatives said there was footage on HBO's "24/7" program that showed Pacquiao having blood taken 14 days before his knockout win over Ricky Hatton.

      Mayweather's promoter, Richard Schaefer, said he was told that Top Rank representatives would be talking to Pacquiao in the Philippines this week to see what cutoff date he would agree to on blood testing. Schaefer said there was a possibility the two sides could compromise somewhere between Mayweather's demand for testing up until the weigh-in and the 14 days Pacquiao had blood taken prior to the Hatton fight.

      The commission's demand for urine tests comes a day after Pacquiao promoter Bob Arum said he would not budge off a proposal to do just three blood tests on the two fighters — and none within 30 days of the fight. Arum, who had suggested the NAC decide next month who will prevail in the dispute, said he planned to begin negotiating a fight with Paul Malignaggi if Mayweather's camp didn't agree to the terms.

      But Mayweather's manager, Leonard Ellerbe, said Monday there would be no fight on Arum's terms, and charged the promoter with trying to shift the blame for the fight not happening from Pacquiao's side to Mayweather.

      "If he's unwilling to do random blood and urine it's a nonstarter," Ellerbe told The Associated Press. "He knows that. If they want to walk away from the richest fight in the history of the sport, that's their decision."