Bruce Lee was famous for the incredible talent he showed for fighting and while his ability was never in question, now there's proof.
Not just a kung-fu movie star, Lee also created martial art discipline: jeet kune do, or 'the Way of Intercepting Fist'.
It was a fast and fluid fighting style that was effective both in the ring and on the street.
Despite sparring regularly with his students, Lee only has one of his MMA fights recorded; it has now been restored on YouTube.
"This is the only recording of Bruce Lee in a real MMA fight. He's fighting Ted Wong here, one of his top students," claims the uploader.
The two men in the video are wearing dark black padding and gloves, outfits which were reportedly 'state rules' at the time.
Most likely the fight was filmed in Los Angeles, where Lee had his Jun Fan Gung Fu Institute, and where Wong studied.
Wong continuously tried to engage with Lee, who kept his distance throughout the fight, punishing Wong as soon as he got close.
On more than one occasion, Wong took a fierce uppercut to the face.
Wong had no other masters, studying only under Lee. He went on teach a 'pure' version of Lee's distinctive jeet kune do.
He also wrote a number of martial arts books and was inducted into Black Belt magazine's Hall of Fame as 'Man of the Year' in 2006, at age 69.