Of my investments that have been realised, buying my first house turned out to be a pretty good move, which I didn't really realise at the time.

I'm incredibly fortunate and it's important to me to make sure that I give back where I can.

Since there are a wide range of entrepreneurs fundraising at any given time, I looked at each opportunity as it has arisen and on its own merits. Then I've sat down with my financial advisers, we've looked at the numbers and gone for the businesses I believe have real potential.

I'm not allowed to make a joke. It is a bit unfair how I'm treated. I thought it was a joke. I got calls and messages. I would rather not to have to worry about things like that. It is disappointing.

I had to pay an incredible amount to get insured on it and, after a couple of weeks of driving it around, I realised it wasn't quite my style. I'm not flash by any means but a bright red Ferrari is a definite head-turner and I hated that. It was also incredibly impractical, particularly when it came to finding space for a friend or for my tennis bag, so I decided to sell it after a few months.

I proved that I can win the Grand Slams. I proved that I can last four and a half hours and come out on top against one of the strongest guys physically that tennis had probably seen especially on this surface. So they would probably be the things that I would say I have learned tonight: To not doubt myself physically and mentally from now on.

Time spent in prayer will yield more than that given to work. Prayer alone gives work its worth and its success. Prayer opens the way for God Himself to do His work in us and through us. Let our chief work as God's messengers be intercession; in it we secure the presence and power of God to go with us.