Stanislas Wawrinka

As a tennis player, you have to get used to losing every week. Unless you win the tournament, you always go home as a loser. But you have to take the positive out of a defeat and go back to work. Improve to fail better.

You can't underestimate rest. Sometimes in tennis we don't realize that to rest your body is as important as it is to practice. We are traveling so much, all year, in different conditions, different courts, different surfaces, different balls - so we always have to adapt.

The Internet has become an integral part of everyday life precisely because it has been an open-to-all land of opportunity where entrepreneurs, thinkers and innovators are free to try, fail and then try again.

As England manager I always felt we needed an extra man in midfield to retain the ball, but that was more as an attacking ploy to help create opportunities. It came from my experience playing international football in a 4-4-2 and spending half my time chasing the ball.