Tennis players need to be very focused and very intense, and I can show tennis players are not just hitting the little yellow ball and moving in between the white lines. I'm always trying to show my personality outside of the court.

I do a lot of biking. I need that mileage and the long-distance stuff because tennis demands it. My fitness trainer is always trying to convince me to do an Ironman. I can probably run the marathon, I can make the 112 miles on the bike, but I will never swim for 2.4 miles. I will die after 100 meters.

It's always hard to find the best friends in the locker room because we are all competing against each other - but the real friends you are going to definitely find off the court because we are competitors in between.

I feel like I'm hitting the ball well. I feel like I'm moving well. I just want to keep getting through rounds. I don't really think I have the luxury of worrying about next week. I have to get there first. There's always upsets, as has been shown so far this week.

I'm not going as a tourist,

You don't need to know who's playing on the White House tennis court to be a good president.