When I'm playing my best, like I was at the U.S. Open, I feel on top of the match and able to do exactly what I want. There are other times when you're not in control, but that is tennis and you have momentum changes in every single match.

I think I will always stay involved in tennis and would like to give back by helping out young players. I have done a little commentary and may one day enjoy doing that again.

My workouts include aerobic exercise for a healthy cardiovascular system; strength training to maintain muscle tone and bone density; core strength exercise for a stable mid-section; and stretching to maintain mobility.

That $27,000 that a young player will now get just for making the main draw at the Australian Open is huge. It can set them up for a couple of months which at that level you really do need that kind of help. It sounds like a lot of money, but when you're travelling the world trying to make it as a tennis player, it doesn't last long.

Receiving the Newcombe Medal for a third year in a row is an amazing honour. The Newcombe Medal is a great occasion for the Australian tennis community to come together and celebrate our sport, recognise people's achievements and contributions to Australian tennis.

Tennis takes care of everything. It requires agility and quickness to get to the ball, core strength to get power into your shorts and stamina to last for an entire match. In addition to toning your arms and shoulders, it's a total body workout for your legs and abs, and works your heart and core unlike any other sport.

I think Serena Williams is the best tennis player of this generation, if not the best ever. It is amazing for her to be playing as well as she is at the age of 31.