At 19, I was European champion, and at 21, I was world champion. Let's just hope Amir Khan can follow in the same footsteps. I believe he can do it 100%; he's a fantastic talent.

I might spar with him, or I might teach him a few tricks, but even if there was $1 billion or £1m offered, I'd never get in the ring with another Muslim. It's against my principles.

My idol, Muhammad Ali, got beat when nobody thought he would, and he came back and back to beat Joe Frazier.

I've knocked guys out in the 11th round before, late.

I carried the WBO belt for five years and defended it 15 times against 10 world champions.

There were a lot of fighters who were better than me that got knocked out and stopped because they stayed in the game too long. That never happened to me. I don't know that feeling. I thank God so much that that didn't happen to me.

As a fighter, I recognise that the one thing we fight for is prizes. The one thing that motivates us is money. A lot of fighters do come back because of money. The biggest spur they have is financial, and thank God my finances were secure, and I didn't need to come back for that reason.

One thing that has irritated me in the sport of boxing since I stopped is I'm really surprised that no one has come along to excite me like me.

The Kelley fight meant that much because it's always when a fighter from this country goes over to America and proves himself, it's always make or break in a British fighter's career.

I just felt I had done enough in the sport to put my stamp on boxing.

I do think I retired too soon. I just felt at that particular time in 2002, after winning a fifth world title belt, why not be one of the smart ones in boxing and get out.

Great fighters get beat, and great fighters come back.

I want to be remembered as a guy who transcended boxing.

I've put myself on this pedestal from the start.

I just refuse to lose.

There's no bigger fight on the planet than Prince Naseem and Marco Antonio Barrera. What's bigger than that? This will be the greatest fight in the history of the featherweight division.

That's what a true professional is - a true world champion, so to everybody out there listening, especially the fighters that want to fight me... they'll get knocked out, sparko.

I don't see anything remotely like me in boxing, past or future.

I still look back at the days in the early '90s and think, 'Boy, that confidence just came out in me strong,' and it was fantastic, the drama and the entertainment I brought.

I want the chance to show Barrera and the world that I am a true champion.

Losing will make me a better fighter.

I believe in my ability.

Yes, definitely, I've got so much belief in God, and I think that God's got so much belief in me.

I'm one of those very confident people who just forgets about fear and gives it to somebody else. I get into that ring, and I walk round, I hear my music, and then I start buzzing.