Recently Former World champion Amir Khan announced his retirement. He belonged to which sport?

Former World champion Amir Khan announced his retirement from boxing after a 17-year professional career. The 35-year-old British fighter, who became the unified World champion in the light-welterweight category, retires with a record of 34 wins from 40 fights. The 2004 Olympic silver medallist won the first 18 contests of his pro career, becoming one of the finest British boxers of his era. Amir became World champion in 2009, defeating Ukraine’s Andriy Kotelnik in a WBA super-lightweight bout and saw off US opponent Zab Judah to add the IBF belt two years later.