Quotes from Jack Sock

I don't want to be that guy that's either arrogant or rubs people the wrong way.

I can personally say if I'm not relevant in the singles world and my only choice is to play doubles, I'd probably stop playing tennis.

My focus is to do the best I can in singles.

When it's best-of-five sets and most of the Slams are hot, humid conditions, you need all the energy and rest you can get in the singles.

Some guys usually get intimidated by my forehand.

Against Rafa or Roger or Novak, it's about getting over that intimidation, believing you deserve a chance to take them out.

When I was the young guy on tour, I don't think I really grasped what it actually takes to be at this level.

Traveling so much to tournaments, you get behind in school work.

Grand Slam matches are always tough.

I was a smaller kid when I was growing up so I had to learn some defensive skills. I had to grind a little bit and win points by scrapping it out.

Kansas City - it's simple living. It has everything that I need.

Some people like the off days to do a light practice or work on things and then get ready for the next match. I don't mind going out and playing a doubles match and working on returning serving and working on a few things.

The goal for the top American isn't the top twenty - it's top ten, top five, number one in the world.

I missed my roots, so I ended up buying a home in Kansas City.

When you're No. 8 in the world, then you start losing some matches, I think it was the first time in my career my confidence went down, and from there it was a downward spiral.

It starts with family - they've sacrificed so much for me, with my parents moving away from each other when we were young, for tennis.

I don't know if it's underrated or not but I have confidence in my speed and my quickness around the court.

I've always had a thing for playing in front of people, and the nerves never really creep in too much for some reason for me.

I like to be interactive, engage with fans and all that and I think the route I took, staying at home, is definitely going to help with that.

If I double-fault or I miss a shot I don't think I should miss, instead of getting more upset, I can think back to the tough times that my brother went through or trying to make my grandpa proud.

My game is pretty straightforward, I feel like. If there's a big point I'm looking for a forehand; looking to be aggressive.

There was something about being in Rio, being around the other Olympic athletes and playing for the U.S. It was the most special experience I've had.

I have a lot of clarity out on court of what I'm trying to do, my style of game. That's just building strengths.

I've always been a little different in the way I've done things, going to high school instead of a tennis academy when I was younger.