I retired because I had a knee injury, my cartilage was wearing out, it was painful and I couldn't put in the four hours of practice each day that I needed to.

If you lived the doubles, as I did, which was very stressful, you are sitting down in a chair experiencing a match without being able to hold a racquet in your hands.

To be a professional tennis player you need to put in these sort of hours.

But whatever happens, when you leave London you feel like a winner because it's a great venue and it's so nice to be there with all the guys.

Suddenly in the end when it's over, you feel a big weight on your shoulders. That's the role of the captain. Unfortunately, it's sometimes like that in sport.

I think our strength is this strong relationship we have all together.

You can be a little lonely because it's an individual sport.