“Variety is what I would recommend: As variety is the spice of life in food, so it is in exercise. Change it up. But most of all, don't overdo it.”

“I've been active in animal rights and all kinds of environmental stuff and children's charities over the years.”

“I am just sorry my own mother had to live under that regime for most of her life. I was lucky. I got out and, 14 years later, Czechoslovakia became a free country. So I feel anger, even fury, at this bloody system that ruined so many people's lives for no reason whatsoever.”

“My mom told me to cover up my arms ever since I was little because I was muscular. She wanted me to be feminine, which did not come easy to me. My body was what it was, and I worked it to be a better tennis player.”

“Julia, I promise to love you, to cherish you, in sickness and in health. No matter what, I will be there for you and our family. I promise not to make the social media another member of our family.”

“I've a great family, two children to take care of. Then, of course, I do commentary for TV. I do speak about various women's issues around the world - like LGBT, motivational speeches. I have a lot on my plate right now. But eventually, yes, I would like to pass on the knowledge and something that I would like to do.”

“Variety is what I would recommend: As variety is the spice of life in food, so it is in exercise. Change it up. But most of all, don't overdo it.”

“I can teach many sports, but obviously, tennis is the one. When you do other sports, you see things from different perspectives: different footwork drills, body positions, angles and geometry. All that stuff is helpful, and so when I do other sports, I can see things, because once you know one sport, then the other sport becomes more clear.”

“The goal for the Laureus Sport For Good Foundation is to give kids an opportunity to be involved in sports and hopefully learn some lessons along the way. We want to put them in a safe environment, help them if they need it and maybe they will get a scholarship to a school because of the skills that they learn. Sport is just a starting point.”

“I've given many lessons in many sports over the years to many different people.”

“Life is about challenges and how we face up to them and the attitude we take into every day life so hopefully we'll be able to motivate people to do more with their life.”