Khan beats Gavin. Khan is one of the very few types of boxers that is all wrong for Gavin. I believe the only boxer capable of outboxing Khan 147 down is Floyd Mayweather Jr. I don't think Gavin has enough pop in his punches to KO Khan. Khan is bigger and has significant hand speed and reach advantage. If Gavin landed a monstrous shot and hurt him he would beat him, but can't see that happening to be honest.
didnt frankie say once in an interview he love to fight khan, something about how he handled him sparring on the GB squard or something. this is only a vague memory so i might completely wrong with the fact but im sure he said something along them lines