Terence Crawford, who claimed the title of best pound-for-pound boxer with a convincing victory over Canelo Alvarez in September, announced his retirement on Tuesday.

American Terence Crawford has shocked the boxing world calling time on his career, arguably the greatest boxer of the current era hanging up his gloves just three months after a legacy-defining win.

The American, who finishes with a perfect record of 42-0, made history in September when he beat Saul 'Canelo' Alvarez to become the first male fighter in the modern era to hold undisputed titles in t...