Drug testing seems to be the first round fight for Manny Pacquiao and Floyd Mayweather Jr. as a misunderstanding surfaces on what type of drug testing should be used on their much-anticipated fight.

According to Golden Boy Promotions, which represents Mayweather, the seven-division titleholder Pacquiao refuses to submit himself for an Olympic-style drug testing process or to a World Anti-Doping Agency procedure. Such methods are stricter and more rigorous compared to what is required by the Nevada State Athletic Commission. One difference example is the lack of random blood testing in the state level.

Floyd Mayweather Sr. has repeatedly accused Pacquiao of taking illegal substances, something that the Filipino denies. Pacman never failed a drug test before.

Pacquiao’s trainer Freddie Roach told ESPN earlier that the pound for pound champ is willing to take the tougher test standards. He said, “They can do whatever kind of drug testing they want. They are scared of Manny and scared of his power. He’ll pass any test in the world.”

Leonard Ellerbe, chief executive of Mayweather Promotions said that for the fight to push through, Pacquiao must undergo the tougher drug tests or the deal is off. The tougher drug test, he claims, was part of the contract.