I think midlife crisis is just a point where people's careers have reached some plateau and they have to reflect on their personal relationships.

I have frequently been questioned, especially by women, of how I could reconcile family life with a scientific career. Well, it has not been easy.

I was always very interested in science, and I knew that for me, science was a better long-term career than tennis. So I decided on science when I was in college.

In all of my career, the style is still the same, and that is of a friend, just sitting and talking.