Amir Khan's shot at WBO world welterweight champion Terence Crawford ended in bizarre fashion when a low blow saw him pulled out by his corner, reported by BBC 

Khan, floored in the opening round, took an accidental shot to his groin in the sixth and after consulting his corner said he was in "too much" pain.

Crawford dominated the contest and later questioned whether Khan quit, urging the Briton to "tell the truth".

"I would never quit, I would rather get knocked out," Khan says.

"I have never been hit below the belt and was in pain.

"I want to apologise to all of the fans. The fight was just getting interesting." He said.