Khan is Britain's third-youngest ever world champion
Amir Khan says he will quit boxing in five years time, at the age of 28.
The Bolton native is the current WBA light-welterweight champion and will defend his crown against hard-hitting Argentine Marcos Maidana in December.
He told BBC Radio Manchester's In the Spotlight: "By the time I'm 28 that's the time for me to hang my gloves up and stay with my family.
"I'm going to walk out of this sport the way I walked in and that's what I want to tell other people who box."
He added: "You don't want to walk out of the sport brain dead."
Khan burst into the boxing world at the 2004 Athens Olympics where he won a silver medal and turned pro shortly after.
However, Khan's future in the sport was questioned when he was knocked out in 54 seconds by unheralded Colombian Breidis Prescott in September 2008.
But 10 months later Khan bounced back, outclassing and outpointing Andreas Kotelnik to claim the WBA light-welterweight crown at the MEN Arena in Manchester.
Since then he has made two defences against Dmitriy Salita and Paulie Malignaggi and his next defence against Maidana will take place on 11 December at the Mandalay Bay Casino in Las Vegas.
To hear the interview in full tune into BBC Radio Manchester on Thursday, 6 October at 1800-1900 BST on 95.1FM, DAB and online at bbc.co.uk/manchester. If you miss the show you can listen again via the BBC iPlayer.
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