"A great tennis career is something that a 15-year-old normally doesn't have. I hope my example helps other teens believe they can accomplish things they never thought possible."

"My main goal is to stay healthy because when you're injured you realise how lucky you are to have your health."

"Whenever I have friends over, we end up eating and talking and losing track of time, and, once in a while, singing karaoke. It reminds me of the family meals we had in Russia, which always lasted a very long time. That's a tradition I miss."

"I'd like to have a family."

"Never underestimate the power of the most profound truths are found in silence."

"Never underestimate the power of human stupidity."

"There are people in the world who have the power to change our values."

"Britain's great strength is its innovative, design and engineering natural ability and we're not using it."