'Um.. Who?' Watch Mayweather Jr's hilarious response when we ask him about Amir Khan!

This is a clip from our December 2009 interview with Mayweather Jr. We happened to ask him about a fighter called Amir Khan...

Unfortunately, Mayweather has absolutely no idea what we're talking about, or who hell Amir Khan is!

Watch and enjoy Mayweather Jr looking like a man who's just been dumped in the Mastermind chair and told his specialist subject is the works of Proust...