Boxing, mixed martial arts and tennis are the hardest sports to train for.

I guess the closest I came was doing chores around the house to earn pocket money. My brother and I would have to do the washing up, cleaning around the house, walking my grandparents' dog, lots of things. We didn't get a huge amount but it was always enough to be able to walk down to the local shops and get some sweets.

We must make humility the chief thing we admire in Him.

When we pray for the Spirit's help ... we will simply fall down at the Lord's feet in our weakness. There we will find the victory and power that comes from His love.

It's hard because you want to be able to just, okay, focus your energy on trying to win the match, but you need to then have tactics as to how you're going to deal with how you're feeling.

I think most players would love, at one stage in their career, to say, 'I've been No. 1 in the world.

You are always talking about yourself and tennis and how you are feeling. I try to avoid it when I don't have to.