Undefeated boxing star Terence Crawford announces retirement at 38

• Boxer hangs up gloves with remarkable 42-0 record

• Last fight was September domination of Canelo Álvarez

Undefeated world super middleweight champion Terence Crawford announced his retirement from boxing on Tuesday, hanging up his gloves three months after a career-defining victory over Canelo Álvarez.

The 38-year-old from Nebraska, who dominated Mexican legend Álvarez in Las Vegas in September to claim the undisputed super middleweight crown, announced his decision in a video posted on social media.