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Amir Khan defiantly insisted he was okay while he was taken to hospital as a precaution after his heavy sixth-round knockout defeat by Saul 'Canelo' Alvarez in Las Vegas.
The WBC champion brutally stopped Khan with a huge right hand to make the first successful defence of his title, inflicting the fourth defeat of the 29-year-old's professional career and exposing him as a natural welterweight too small to convincingly compete at the catchweight of 155lbs.
There was little shame in the nature of the defeat for Khan, who impressed with his speed and combinations in the opening five rounds until Alvarez's superior size and strength began to slow him down and leave him vulnerable to the knockout that followed.
Khan said afterwards he expects to return to 147lbs, where he is undefeated and where his domestic rival Kell Brook is the IBF champion, and added on Twitter on his way to hospital: "Im okay everyone. thats boxing for you, congrats to @Canelo monster punch, much love to all the fans! #CaneloKhan"
He hit the canvas so heavily it was instantly obvious the fight was over - the official time was two minutes and 37 seconds of the sixth round - and the 25-year-old Alvarez knelt beside him to check he was okay.
"You want to win by knockout, but you don't want to hurt anybody," the Mexican said. "It was a human reaction to make sure he was okay and I'm glad he appears to be."