Earlier in the week, an SB Nation report came out alleging that undefeated boxer Floyd Mayweather Jr. illegally took an IV to aid rehydration before his May fight with Manny Pacquiao. As noted by CBSSports.com, the report also alleged that the USADA was aware of the IV usage and retroactively gave Mayweather an exemption for it.

Shortly after the report made rounds, both Mayweather and the anti-doping agency released statements to address the issue.

"Whether due to general misunderstanding of the facts, or an intentional desire to mislead, numerous unfounded and false accusations have been leveled against USADA in recent online articles," the USADA's statement reads.

"As was already publicly reported in May of this year by the Nevada State Athletic Commission (NSAC), Mr. Mayweather applied for and was granted a Therapeutic Use Exemption (TUE) by USADA for an IV infusion of saline and vitamins that was administered prior to his May 2 fight against Manny Pacquiao. Mr. Mayweather's use of the IV was not prohibited under the NSAC rules at that time and would not be a violation of the NSAC rules today. Nonetheless, because Mr. Mayweather was voluntarily taking part in a USADA program, and therefore subject to the rules of the WADA Code, he took the additional step of applying for a TUE after the IV infusion was administered in order remain in compliance with the USADA program."

Mayweather, who is slated to face Andre Berto this Saturday took to Twitter to release his own statement.

"As already confirmed by the USADA statement, I did not commit any violations of the Nevada or USADA drug testing guidelines," he wrote. "I follow an dhave always followed the rules of Nevada and USADA, the gold standard of drug testing. Let's not forget that I was the one six years ago who insisted on elevating the level of drug testing for all my fights. As a result, there is more drug testing and awareness of its importance in the sport of boxing today than ever before. I am very proud to be a clean athlete and will continue to champion the cause," Mayweather ended the series of tweets, while also linking to USADA's statement.