Manny Pacquiao threatens Floyd Mayweather and his camp with legal action over a drug-testing row . Pacquiao is angered by demands that he submit to blood-testing in the build-up to a proposed bout . The fight would be Pacquiao's first since winning world titles at welterweight and junior middleweight last year. A welterweight match between Pacquiao and Mayweather is slated for Las Vegas on March 13 next year .
Manny Pacquiao threatens Floyd Mayweather and his camp with legal action over a drug-testing row . Pacquiao is angered by demands that he submit to blood-testing in the build-up to a proposed bout . He claims to have instructed his promoter Bob Arum to file a law suit as soon as possible . A welterweight match between Pacquiao and Mayweather is slated for Las Vegas on March 13 next year .