Alistair Overeem

This is a full-contact sport. It's the objective to disable your opponent, even if sparring or a real fight. You've got to use your technique.

Even if we were friends, I consider this a sport, a competition, so there are no ill feelings towards any other fighter or whatever.

This level of competition is extremely high. Everybody is trained. Everybody has a game plan. Everybody has a nutritionist. Everybody has everything. It's here that you realize, as people, we're all equal.

I do believe that Brock Lesnar will be coming back. I don't want to call it from retirement, but he is a huge draw, big guy, sells tickets. So that's a fight I would be interested in.

As a fighter, you need to constantly improve. So that's what we've been doing: constantly improving striking, grappling, wrestling - there's always different aspects to improve.

I have stated many times that one of my goals was to become K-1 champion. K-1 is, in our country Holland, very popular, and it's a big opportunity to become the first person that holds two world titles in two different sports.

No, I'm not going to retire. Not going anywhere. I'm focused on the UFC. It's the biggest stage.

Brock Lesnar was a big guy: he's at 280 when he fights. When fighting him, you can have a bit of that extra muscle because you don't want to be thrown around like you're nothing.

I don't have any concerns fighting a teammate. It's a sport. To me, it doesn't really mean anything.

I'm happy where I'm at now, but I want to show the world that I'm the No. 1 fighter. I want to prove it the world. I'm focused and ready.

I've always been a fighter and always competitive.

It was always my goal to go back to MMA because my passion is there.