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.

The whole point of team competition is to pick your teammates up.

If I can break one out of every three return games, I'm going to give myself a shot in a lot of matches.

I don't know that I've ever been someone who's interested in existing on tour. I have a lot of interests and a lot of other things that excite me.

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

I do understand that when someone gives you a [expletive] load of money, you take that money. Someone like Larry Ellison wants to invest into his event and make it the biggest possible, and he gets stopped by the ATP. If you're a start-up, what would make you want to navigate through that and to go through that firing line? How can you step into tennis with any confidence? It's the stupidest thing I've ever heard of.

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.