I've been lucky enough to primarily work for myself over the years.

What separates the winners from the losers is that they can deal with doing their best while still coming up short.

You can look directly at the NFL and see how successful they've become because they have central control, central voice, and it doesn't mean that the owners don't have a say, but the commissioner runs it, and he's the one who speaks for them when they go out and do commercial deals.

It's really easy to find your friends when you're playing away. You have a close-knit group with you and everyone else is cheering hard for their side. There's more satisfaction coming away with a road victory.

I've been lucky enough to primarily work for myself over the years.

There's plenty of anecdotal evidence that most champions are born into certain environments and encouraged early. Then, later on, they might get some assistance from their federations.

I am there to play tennis and represent the U.S., but I'm also aware that not everyone's going to be able to think that way.