Khan, Olympic lightweight silver medallist at the 2004 Athens Games when he was 17 years old, won the WBA light-welter belt from Ukrainian Andriy Kotelnyk in 2009 and added the IBF title in 2011 when he beat American Zab Judah.
He bows out with a record of 34 wins from 40 fights, with six defeats.
It’s time to hang up my gloves. I feel blessed to have had such an amazing career that has spanned over 27 years.… https://t.co/0kweeNAkYu
— Amir Khan (@amirkingkhan) 1652438851000
His latest was a sixth round stoppage against long-term rival Brook, who retired last week, in Manchester.
“It’s time to hang up my gloves,” the 35-year-old, who turned professional in 2005, said on Twitter.
“I feel blessed to have had such an amazing career that has spanned over 27 years.”