Amir Khan rolls the dice against dangerous Terence Crawford

Bolton’s former world light-welterweight champion is aware of the risks as he takes on the undefeated Terence Crawford at Madison Square Garden on SaturdayThere have been unmistakable valedictory overtones in the final run-up to Amir Khan’s fight with the dangerous Terence Crawford on Saturday at Madison Square Garden.The twice former world light-welterweight champion is plainly closer to the end than the start of his fighting days, nearly a decade and a half since he vaulted to star