Floyd Mayweather has claimed that he can prove his former girlfriend, Josie Harris, was high on drugs during a 2010 domestic violence incident. 

In the latest documents, cited by TMZ, Mayweather said he has medical records of Harris admitting to taking Xanax, Wellbutrin and marijuana. He also reportedly said that Harris had accepted taking half a pill of Ecstasy in 2004 before going to a club.

Harris had filed a case in May against Mayweather claiming defamation, intentional infliction of emotional distress and negligent infliction of emotional distress, after Mayweather said during an interview that he only restrained a woman high on drugs but did not beat her.

Floyd filed new documents as a response to Harris’ $20 million lawsuit over his interview with Katie Couric in April, where he said: “Did I kick, stomp, and beat someone? No, that didn't happen... Did I restrain a woman that was on drugs? Yes, I did,” adding: “So if they say that's domestic violence, then, you know what? I'm guilty. I'm guilty of restraining someone.”

Mayweather was arrested in September 2010 after authorities said he punched Harris at his Las Vegas home where she lived with their two sons and daughter. Harris, who now lives in Valencia, California, claimed that Mayweather started punching and kicking her while she slept on the couch. She also claimed that Mayweather dragged her around the house in front of her children, and had to visit a hospital next morning to be treated for head, facial and bodily injuries.

"It was not Mayweather's 'restraint' of Harris that caused her serious injuries, rather it was his beating of her," Harris’ lawyer said in the defamation lawsuit, CNN reported.

The renowned boxer was given a reduced charge of misdemeanor battery and two counts of harassment after 14 months. He was sentenced to three months in jail but served only two.