I feel like I'm more a fan of tennis rather than it being men's or women's. I enjoy watching doubles as well when it's on. I think that there are certain players that I enjoy watching on the men's and women's side. There's some players that I don't enjoy watching on both sides.

I just enjoy watching tennis. And there's things that you can learn from the men's and the women's game.

Earlier in my career, I used to spend a lot of time practising my tennis on court. Now I've learned that it's better to do just a couple of hours on court and two gym sessions a day. That's what's made me fitter and stronger.

My speed is something that has made a difference to my whole career. When I've felt quick and I'm moving well, it makes a huge difference to my entire game. When I feel a bit slower, I end up doing a lot more defending. When I'm a bit quicker to the ball, I feel I can attack a lot more.

Ambition is the last refuge of the failure.

Although engineers want always to make everything better, they cannot make anything perfect. This basic characteristic flaw of the products of the profession's practitioners is what drives change and makes achievement a process rather than simply a goal.

The reason for natural selection's great success is that it provides a satisfying explanation of how evolution might have occurred: individual organisms vary, and if those variations are inherited, the successful ones will survive and propagate and pass down their desirable traits to succeeding generations.

I am often asked why I started to write poetry. The answer is that my motivation sprang from a visceral need to creatively articulate the experiences of the black youth of my generation, coming of age in a racist society.