But I'm ready for what's next after rugby. Being able to not just say that, but to truly feel it, is a privilege. Ultimately, getting to leave your sport on your own terms is all you can really hope for as an athlete.

I have never liked the word retirement. It doesn't feel like a modern word to me. I've been thinking of this as a transition, but I want to be sensitive about how I use that word, which means something very specific and important to a community of people. Maybe the best word to describe what I'm up to is evolution. I'm here to tell you that I'm evolving away from tennis, toward other things that are important to me.

Well, I ran out of gas. You know, I got to be what, 93 at that time, or something like that. And it just – same reason I gave up teaching. I teach – I was – I taught every year from when I was 21 till 88 or 89, and there just came a period when your body said different things to you, and you should turn it over to somebody, just like I did at Berkshire.

No, because I was set for it. My core, my whole life was medicine. I wanted to become a specialist. So for ten years I concentrated solely on medicine. It took ten years to become a consultant in neurology.

Finding true love with my wife, Marie-Josée, has been one of the greatest gifts of my life.

There is nothing more important to me than my children and focusing on them. It’s the quality of time with my children, not the quantity of time that I’ve found to be important.

it’s that grit, that determination, that fortitude, that gets you through what you set out to do.

We have made many investments in our history. Not all have succeeded. As entrepreneurs willing to take some risk, we have made many mistakes. But when we are successful, we leave the company better than we found it.

There's still much to do, and I'm not slowing down.

One person that is my role model is my father. ... He’s a man who taught me something very important. And that was — give back to society what you’ve taken out.