Khan, 26, was once again put on the canvas in the contest after proclaiming his total resurgence under new trainer Virgil Hunter and will now have to re-think his new-found strategy after a struggle against a former lightweight king.
I had Khan an 8-4 winner, plus the knockdown, but even so, the Bolton man has not acquired anymore believers that would have the Olympic silver medallist reigning in any division anytime soon.
The question marks about his weak chin have only been reinforced after Diaz caught him numerous times throughout the contest, although his outstanding boxing skills were beyond comparison to the Mexican-American.
Where Khan moves on from here is anyone’s guess regarding a December opponent for his US return, but there is still plenty of work to be done to convince anyone that he could compete with the formidable pound for pound number one Floyd Mayweather Jr.
