Nevada State Athletic Commission (NSAC) executive director Bob Bennett has "no problem" with Floyd Mayweather Jr over allegations the legendary boxer used a banned IV following his weigh-in for his fight against Manny Pacquiao in May.

SB Nation reported that members of the United States Anti-Doping Agency (USADA) made an unannounced visit to Mayweather's Las Vegas home the afternoon before the fight and found evidence that the undefeated world champion had used a prohibited IV to prevent dehydration.

Two mixes were reportedly found at Mayweather's home, one of saline and vitamin C and the other of saline and multivitamins. According to the World Anti-Doping Agency (WADA), the mixes are not illegal, but administering them by an IV is. 

It was said to be not until 18 days after the fight that USADA granted Mayweather a retroactive therapeutic use exemption (TUE) to receive IV injections. 

However, USADA reportedly did not tell NSAC - who were responsible for jurisdiction of the WBO welterweight title fight - of that decision, so the exemption was not in place when Mayweather and Pacquiao locked horns.

Bennett reacted to the report by stressing that he has no issue with Mayweather, who won on points in Las Vegas, but hit out at USADA.

"Floyd has always been a proponent of drug testing, which I applaud. He's set a fine example for all to emulate," he told the Las Vegas Review-Journal.

"He's never tested positive in his entire career for any performance-enhancing drugs and, as a commission, we have no problem with Floyd Mayweather.

"As far as USADA, I was extremely disappointed that I wasn't notified right away (about Mayweather receiving an IV). When it comes to TUE, we are the sole agency that approves the administering of TUEs. USADA, nor any other anti-doping agency that does drug testing, doesn't have the authority to adminster a TUE.

"The bottom line is USADA didn't keep us informed, which is totally unacceptable and unprofessional."