Most players who play tennis love the game. But I think you also have to respect it. You want to do everything you can in your power to do your best. And for me, I know I get insane guilt if I go home at the end of the day and don't feel I've done everything I can. If I know I could have done something better, I have this uneasy feeling.

I don't think about tennis 24/7. I enjoy time on the lake at my Florida home and just being lazy on the sofa.

I used to hear a lot that all I could do was hit a serve, I couldn't volley, I can't hit a backhand, I don't return well, and then people would turn round and tell me I'm underachieving.

I used to, like, hit for a half hour and then go eat Cheetos the rest of the day, come out and drill forehands. Now I'm really trying to make it happen, being professional, really going for it, and I miss my Cheetos.

For every bad moment I've had, there have been 25 positives.

One of the cool things I remember is the Swiss people brought their big cowbells.

I've been good about keeping my nose to the grindstone.