I believe I'm a born winner. I always think about winning.

To move up to heavyweight to fight me is a jump too far, in my opinion.

I watched a TV documentary about how animals are farmed, killed and prepared for us to eat. I saw all those cows and pigs and realized I couldn't be a part of it any more. It was horrible. I did some research to make sure I could still obtain enough protein to fight and, once satisfied that I could, I stopped. I'll never go back.

One of my favourite fighters was Lennox Lewis - he got out at number one. A fight with the winner of the Wladimir Klitschko and Anthony Joshua fight would put me at number one.

They may be big in Switzerland, but so are yodellers, and nobody wants to watch them fight. Heavyweight title fights should be huge events, not an after-thought in a country most famous for producing Toblerones [chocolate].

I normally get paid tens of millions of pounds to fight and I ended up fighting for free. I don't like fighting for free.

To be a successful boxer, the last thing you need to be doing is turning up to the gym stoned. You're going to get beaten up if you do that.