35-year-old Amir Khan, a former world champion and Olympic silver medal winner, has decided to retire from the sport.

Khan officially announced his retirement on Friday morning.

After a layoff of more than two years, Khan returned to the ring in February for a clash with longtime career rival Kell Brook.

The Bolton star, who appeared to have little left in the tank, was dominated and ultimately stopped in the sixth round.

After suffering the tough loss, Khan (34-6, 21 KOs) had initially planned to retire - but he also had the ability to exercise an immediate rematch clause, and he teased the possibility of a second fight with Brook happening, but eventually stepped away from that scenario.

Brook announced his own retirement from the sport last week.

Khan was 17 years old when he captured an Olympic silver in the 2004 Olympic games in Athens.

Over the course of his pro career, Khan made a tremendous amount of money and became a crossover name in the United States. 

“It’s time to hang up my gloves. I feel blessed to have had such an amazing career that has spanned over 27 years in a sport that I love with a passion," Khan said.

“From the young 17-yr-old Bolton lad achieving his dream of winning an Olympic medal for his country and becoming a two time world boxing champion. Boxing has made me and has given me a platform which I have proudly used to help and inspire others. 

“I want to say a heartfelt thanks and to the incredible teams I have worked with and to my family, friends and fans for the love and support they have shown me.”