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Conor McGregor has been tested by USADA twice as many times as Floyd Mayweather ahead of their boxing contest on August 26.

A USADA representative confirmed with on Friday that McGregor has currently been tested by the anti-doping agency ten times in comparison to Mayweather’s five. The reason behind the disparity is McGregor’s previous agreement under his UFC contract, which requires him to be available for random testing at all times.

As such, McGregor has been tested five times for his boxing bout, and five times for mixed martial arts. The two agreed to extensive testing during negotiations for the mega-fight earlier this year — something UFC president Dana White gave Mayweather plenty of credit for during the media tour last month.

USADA tests look for any banned substances under the World Anti-Doping Agency guidelines. It also can detect EPO, HGH and other such illicit drugs. Speaking with MMAFighting earlier this year, a spokesman for the company provided details on McGregor and Mayweather’s testing protocol.

“The program is consistent with other professional boxing programs USADA has conducted over the years where the athletes agree to robust testing,” the representative said. “It primarily focuses on out-of-competition testing, all samples are analyzed at WADA accredited labs and the rules are consistent with the WADA Code and UFC Anti-Doping Policy. And like all our anti-doping programs, we start by educating the athletes and their representatives to ensure they’re properly informed of their rights and responsibilities.”

While the procedures can be time consuming and inconvenient, it at least provides assurances that both men are entering the bout under the most stringent testing possible.