John Isner

“My theory is that I'm just closer to the sun than everyone else. I weigh more than everyone else, I'm taller than everyone else. When it's really humid and hot outside it's going to take a bigger toll on me.”

“Usually I'm traveling for tennis, so the most important thing for me is to not get jet lag.”

“I was always a late bloomer.”

“I think college tennis makes you tough.”

“A big upper body is not a great thing for tennis, and for me, flexibility is important.”

“Practicing hard doesn't guarantee you anything.”

“There is so much that goes in to being a good tennis player. It's not just what you can do well on the court, it's between the ears as well.”

“For the most part I consider myself a mentally strong player.”

“It's awesome to have the crowd on your side.”

“That would be a huge honor, if I ever were to become the No. 1 American. It's something that I've always wanted to, you know, achieve that. For me, if were to happen, it'd be great. I'd try to hold onto that spot as long as possible, but I know there'd be a lot of people nipping at my heels to try to get to that No. 1 spot.”

“My family and friends, they know that I'm a really good competitor.”

“Nothing against the Olympics. I played in 2012 and it was an incredible experience. It's different for tennis players than for swimmers and track and field athletes. That's the pinnacle of their sport and not so much the pinnacle of tennis.”

“A lot of players have had it worse than me. Look at a guy like Andy Roddick, incredible Hall of Fame player, but he ran up against Roger so many times in big finals.”

“In the past, I've played where I only just rely on my serve.”

“I try to bring a lot of water on the plane with me and eat a really good meal.”

“I always knew that my best tennis was going to be in my late 20s.”

“I try not to make a habit of spending the whole year losing in the first rounds of events, but tennis is one of those sports where nothing is guaranteed.”

“When I left college, I just thought I could play tennis to delay getting a regular job and go there and try to make ends meet. But it's been a very different experience for me, fortunately.”

“I love building a team around me, and being able to support a group of people is one of the best feelings I've come to know during my career; I imagine this is what a lot of business owners can relate to this.”

“People often come up and tell me how much money I make in a year, which is funny because I don't think it's something I've ever said to someone.”