Calzaghe picks himself up to beat Hopkins

Joe Calzaghe battled back from a stunning first round knockdown to score a disputed split decision victory over Bernard Hopkins in Las Vegas and reign as light-heavyweight world number one.

Calzaghe extended his unbeaten record to 45 fights but only after by far the toughest test of his career against 43-year-old Hopkins, whose big right hand had got him off to a flying start.