Power and speed aren't enough to overcome someone who is strategic, who knows what you'll do before you do it and can turn it on you; someone who is mentally engaged and combines the whole package.

Ask José Mourinho, he wouldn't know a thing about me, my sport - he knows football, and to get to high levels you have to be insane, nothing else means anything.

I believe in working harder and putting in the time - being completely obsessed. And, yeah, I think that's life.

There are people who have great skills, who do great things, but don't embody the whole animal that is the fight game like I do.

One of the reasons I got into this game was because I wanted to learn how to get myself comfortable in uncomfortable situations. I grew up in a tough area of Dublin, and fighting was just part of your life. Boys fight, and I won some, but I lost a lot too, and I didn't like that, I didn't like that feeling of not knowing whether I was in danger, in trouble.

Sometimes I train in the middle of the night, all on my own. Can't sleep, don't want to sleep, get up, go to the gym, work. This is early for me, being here at half ten in the morning, this is really early, and I'm only here because I screwed up yesterday and kept you hanging around. Other times I'll call up my wrestling coach, or my jiu jitsu coach, or my deep-tissue guy, and want to really focus on one part of what I do. I train in all these different disciplines.

It's gone, boxing's gone. What is there in boxing? Who is there to talk about, who is there that people go, "Yeah I want to fight him?", and fans go "I wanna see that fight"? There's Floyd Mayweather, and he is 38, 39, he's maybe got one fight left. What else is there? He'll have a last fight or two and a couple of guys will get a few million dollars, but way less than I'm gonna be getting in future. This sport is getting bigger all the time, and I am making it bigger.