On being the enfant terrible of tennis:
"People have personalities ... seems like umpires did terrible jobs when I came out, so to me it was normal, you're confronting people all the time, so I was surprised when I went to England and they thought I was Attila the Hun or something.
"I think despite what you may see here, I'm not as physically intimidating as a Rafael Nadal, so you have to try to get an edge in a different way. One person who I saw that did an unbelievable job at that was Connors.
"The guy wanted it more, he was hungry, he tried harder, and he had this intensity. He hated your guts before he stepped on the court so I had to try to get inside someone's head and get myself so worked up so they'd feel they were up against it.
"So the best way I knew how was to give 110% and want it more than them, and walk on the court and every moment of the match feel like it was the end of the world, in a sense. So that worked for me in a lot of ways. There were times that it hurt me but for the most part it helped me."
On being shy underneath the anger:
"Well it's a bit of an act now, but to me it wasn't an act then. I felt like it was something that just came out. Believe it or not I was a pretty shy youngster growing up. I guess the cat was out of the bag when they said, 'Hey there's umpires and you can question calls.'
"In juniors, we don't have that. There are no umpires so it was a big change and all of the sudden it was a different situation. I saw guys I learned a lot from, like Connors and (Ilie) Nastase, I mean people were starting to rebel against the typical tennis players who were very polite and were wearing the long pants and who would act a certain way, and we wanted to be considered the way athletes in other sports were.
"On an American Football field or a soccer field, they're not saying 'Hello, how are you out there?' "
On why tennis needs strong rivalry:
"I didn't get along with most of the players I played against, but the one guy I did get along with was my greatest rival, so it can be done. Nadal and Roger Federer have great respect for each other. I think Novak Djokovic gets under those two guys' skin a little bit and maybe they don't want to admit it and I think that's in a way healthy.
"I think fans react to that more, if they sense there's something extra there other than two great tennis players. It's one thing if you live in London and you're rooting for Chelsea or you're in New York and you love the Giants or Jets and no matter who's on the team you're into it. It's different in tennis, you're sort of your own guy, so you have to reach out and grab a person in a different way."
On being a YouTube star:
"I've gotten a second wind with the kids. They're like, 'Man you were crazy,' but I don't think it compares to some of the crazy things going on now in the sports world -- off the field even more so than on. I mean, I'm sort of vanilla in a way.
"Yeah, I was getting into it but no more so to me than some of the other sports. I think because it was tennis, it was different."
On his dream opponents:
"I wouldn't have done well against Nadal on clay, that's for sure, but I always dreamed of playing Bjorn Borg on clay -- we never played at the French Open, probably for the best when I look back, and I bet Nadal would have been a similar nightmare.
"Sampras on grass would have been the ultimate test, and Federer -- I have to play him, Boris Becker was one of the greats, I played Boris, but on grass we never actually played at Wimbledon.
"And clearly Djokovic now because I played Connors and I said this guy's the greatest returner I've ever seen, and I played Agassi and said he's even better than Connors, and now I see Djokovic can sort of play offense and defense off the return, so he would be unbelievably tough as well.
"Out of the four guys (in today's rankings) Andy Murray probably plays close to the style I played. We actually did play very early in his career, some sort of big match in London with a big group of guys, winner take all sort of thing. The reason I brought it up is that I won -- Andy may have been seven at the time (laughs)."
On why New York will never lose the U.S. Open:
"I don't worry about that. I would be more worried about like the Australian Open if I was someone Down Under. They've done a good job trying to reach the level of the other three slams but you've got Paris, London, New York ... that's a pretty good start. Australia should be worried about China.
"You're talking to the wrong guy 'cause I live in New York, so New York is the greatest city in the world."