LOS ANGELES, USA (AFP) — Floyd Mayweather received an injection of saline and vitamins on the eve of his superfight against Manny Pacquiao, the United States Anti-Doping Agency said yesterday, but denied the boxer had violated any sporting drug laws.

A strongly worded USADA statement lambasted reports which said Mayweather had breached World Anti-Doping Agency (WADA) rules by having the IV infusion, even though the substances in question were not banned.

The USADA statement said reports on the controversy had contained a “multitude of errors” and were “riddled with significant inaccuracies and misrepresentations.”

“We believe it is important to immediately correct the false suggestion that Floyd Mayweather violated the rules by receiving an IV infusion of saline and vitamins,” USADA said.

Mayweather later yesterday issued his own statement, noting USADA’s rejection of claims of wrongdoing.

“I follow and have always followed the rules of Nevada and USADA, the gold standard of drug testing,” Mayweather said.

“I am very proud to be a clean athlete and will continue to champion the cause.”

USADA said Mayweather had applied for and was granted a Therapeutic Use Exemption (TUE) by the agency for the IV infusion, in accordance with regulations set down by the Nevada State Athletic Commission (NSAC).

“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,” the statement said.

It said Mayweather, a voluntary participant in the USADA programme, had formally applied for the TUE after the infusion in order to remain in compliance USADA rules.

The agency said although the application was not approved until after the fight, Mayweather “did disclose the infusion to USADA in advance of the IV being administered to him.”

“Furthermore, once the TUE was granted, the NSAC and Mr Pacquiao were immediately notified even though the practice is not prohibited under NSAC rules,” it added.

A report late Wednesday on the SB Nation website said Mayweather’s infusion had come to light after USADA agents visited the boxer at his Las Vegas home on Friday May 1, the day before the Pacquiao fight, to conduct a random unannounced test.

The report said the IV consisted of two separate mixes of saline and vitamins which had been administered to address dehydration concerns.

It added that while the substances in question were not prohibited under WADA rules, administering them intravenously was a breach of WADA regulations.

WADA did not immediately respond to requests from AFP for clarification.