Marvin Hagler — American Athlete born on May 23, 1954,

Marvelous Marvin Hagler is an American former professional boxer who was Undisputed World Middleweight Champion from 1980 to 1987. Hagler made twelve undisputed title defenses and holds the highest KO% of all undisputed middleweight champions at 78%. At six years and seven months, his reign as undisputed middleweight champion is the second longest of the last century, behind only Tony Zale, who reigned during WWII. In 1982, annoyed that network announcers often did not refer to him by his nickname, "Marvelous", Hagler legally changed his name to "Marvelous Marvin Hagler.".. (wikipedia)

There are a lot of things and in order to be at the top and maintain your focus you have to have something that motivates you. For me, it was what I perceived as a lack of respect from the boxing world as well as the media, which made me want to work so hard and be great.
Even though the outcome wasn't the way it should have been, publicly I still feel in my heart I won the Sugar Ray Leonard fight.
Well, you can't trust most people in this game, period; it can be a very shady business.
Oh yeah, I mean every fighter has got be dedicated, learn how to sacrifice, know what the devotion is all about, make sure you're paying attention and studying your art.
The likes of Sugar Ray Leonard, Roberto Duran, Tommy Hearns were true champions. There were some incredible fights between us, and I was happy to give them all an opportunity to fight me.