I got to world champion, No 1-rated fighter in the division and managed to earn from the defences.
Look at what George Foreman did to Michael Moorer. No matter his age, he hits so hard that he's always in a fight.
I'm proud to be one of only a few fighters in history to retire undefeated.
When I win, I send shock waves through the boxing world.
I've fought everybody without ducking anyone. I have beaten 10 undefeated guys, and I never was comparing myself to the greatest in the sport. I was not thinking of breaking any records. I'm just enjoying my time in boxing.
I've beaten some of the wisest, most opportunistic and powerful women, and I will prove to Asuka that she is not unstoppable.
Sugar Ray Robinson was the greatest, pound-for-pound, ever. He fought most of his career with just one loss, and that was to me. He had 131 fights with one loss.
As far as the path of [Bill] Goldberg and all his ultimate success, I don't think any of that was planned. It was all organic. All of it was so different.
I know plenty of wrestlers who are 15-0 and going nowhere.
When the Heat were put together, there was talk of going undefeated. They didn't get off to a great start, but they found a way to win back-to-back championships.
I went to America and beat Shawn Porter, a guy that was being called a 'mini Mike Tyson' and that most people were saying was going to take over from Floyd Mayweather. I went to his backyard and ripped his title off him.
How many fighters are going to be able to leave the legacy that I did? Nineteen years old, I came and I conquered.
In 1973 I became heavyweight champion of the world with 38 victories, no defeats as a professional. You get to a point where you think you cannot lose. I felt like I had the greatest power with my fists, I was the strongest man in the world.
A battle won is a battle which we will not acknowledge to be lost.
Fighting against undefeated IBF 154-pound champion Marie-Eve Dicaire continues my quest to fight the very best in women's boxing.
I know, every fighter knows, you've got to pile up wins in a row. You can't lose two in a row, three in a row and then you hear mentions of losing your job.
I look at a streak as I don't lose - literally.
I want to be undefeated for a while and end my career as one of the greatest of all-time.
I turned pro as a 20-year-old, won a world title a year later, and remained a world champion ever since.
I'm 17-0 in the UFC. I'm unbeaten in MMA.
In my prime, I was the ruler. Simple as that. I understand there's a lot of great fighters who've followed me already since I was the champ - and I hope there's another who comes along does even better because want to see that - but I haven't seen anyone do what I did yet.
I don't take that away from Conor, that he beat Chad Mendes on short notice. Chad took that fight knowing he had a chance to beat Conor, so that's Chad's fault he took that fight.
My Client Brock Lesnar conquered the Undertaker's undefeated streak at WrestleMania!
Every person I wrestle, it's the biggest match of their career. They're Buster Douglas. But what's the honor in being Mike Tyson and beating Buster Douglas? I win and move on. They win, and it's a game-changer for the rest of their lives.
I'm close to achieving something that very few boxers ever have - and that is to retire undefeated, like Rocky Marciano.
