So, it was hard to fathom letting go. Age was part of the reason. We were both 77 at that time.

No, because I was set for it. My core, my whole life was medicine. I wanted to become a specialist. So for ten years I concentrated solely on medicine. It took ten years to become a consultant in neurology.

No, I think they were two totally different careers, because when I was acting, I was always impersonating different people, so it was never me—it was never myself. When I started to sing, I suddenly felt naked. I mean, I knew that was going to happen, because that’s the reason why I couldn’t do it before—when I was a teenager, I just couldn’t play in front of anyone at all—it was impossible, my hands started to shake, my voice was gone, and I was so self-conscious of what people would think about what I was doing. Because I didn’t know how to play songs that anybody knew—all I knew how to play were my own songs, and so I had this feeling of having my own chords and my own things that weren’t—I was afraid of being judged as doing nonsense music. But then maybe what the acting did to me was that I got more courage to do what I really wanted to do, even though I had all these fears that were still inside me.

As many of you know, the past three years have presented me with challenges in the form of injuries and surgeries. I've worked hard to return to full competitive form. But I also know my body's capacities and limits, and its message to me lately has been clear. I am 41 years old. I have played more than 1,500 matches over 24 years. Tennis has treated me more generously than I ever would have dreamt, and now I must recognize when it is time to end my competitive career.

When I was in Beijing, London, and also in Rio I was still a kid really, I didn't feel pressure. Now I'm a 26 year old woman. Being a lot older I feel those expectations. And it's definitely hard on my shoulders, to the extent where in training I'm ok but in competitions I panic, and I do stupid things. Working with [my psychologist], at these Games one of the things I'm proud of is I didn't have any panics. I was so happy about that - I went out and raced and enjoyed it.

I love swimming and I'll still be found in the pool, but now I'll be able to do without the 04:30 alarm!