In racing, things start coming up quicker, and the slipstream is stronger, so even judging in the mirrors how quick the cars are approaching isn't always easy.

It's a complex sport; you're always learning.

There have been times in my career when people thought I was a pushover, especially as they saw me as this smiley guy.

I had a very successful 2014, but I have got to keep aiming for bigger and better things, so the world title is my goal.

I'd like to settle and have a family and get married when I'm, like, 30.

I love L.A. It was an awesome place to spend my 20s, full of creative people, but I never wanted to stay there. It wasn't necessarily Texas that I wanted to move to; I just knew I wanted to live in the country somewhere. My wife and I found this place in Texas that we really liked, so we packed up our stuff and moved.

It's important to understand that you have to dedicate time to your sponsors, to have relationships with the people and the media, but it is also hard when you are first coming up and your primary focus is on tennis.

It's very interesting, if you look at a study that was done by the Brookings Institute back in 2009, they determined that if Americans do three things, they can avoid poverty. Three things. Work, graduate from high school, and get married before you have children.