As a tennis player, or any professional athlete, our career has a shelf life. I don't want to waste any opportunities, I don't want to look back on it when I'm 45 and think I could have done a lot more.

I didn't know I could even be a professional tennis player, honestly. All this is actually very, very unexpected.

A lot of times when I'm confident and relaxed on the court, I'm going to be a pretty tough out. But when I'm not so confident and not so relaxed, I tense up and my balls fall short and everything. It just sort of unravels.

In the past, I've played where I only just rely on my serve.

There is no reason why cricket shouldn't be the number one alternative to football. And at a time when there are obvious divisions in society, cricket has a great role to play in bringing people together from all sorts of diverse backgrounds and faiths.

I want my kids to be proud of their dad and not to go to school and hear abuse. One day they will read many things about me and I would like it to be about football.

Going back to the '70s and '80s I was one of the athletes who believed in true sport. I never took medical supplements, believed in diet and exercising. I always represent clean athletes.

Football can make things different, and football can make change around the world. I hope football can do something for Korea.