Well, I ran out of gas. You know, I got to be what, 93 at that time, or something like that. And it just – same reason I gave up teaching. I teach – I was – I taught every year from when I was 21 till 88 or 89, and there just came a period when your body said different things to you, and you should turn it over to somebody, just like I did at Berkshire.

I have never liked the word retirement. It doesn't feel like a modern word to me. I've been thinking of this as a transition, but I want to be sensitive about how I use that word, which means something very specific and important to a community of people. Maybe the best word to describe what I'm up to is evolution. I'm here to tell you that I'm evolving away from tennis, toward other things that are important to me.

As a very young singer, I was invited to the opera house in Berlin by the then-director of the opera house, Egon Seefehlner, and I had one opera to my name that I knew. He felt that there was a lot that I could learn there, which was very true, and I was so lucky to be able to have this opportunity. The thing that was happening is that I kept being offered operas that I knew that I wasn’t ready to sing, just from an experience point of view, as well as being 24 years old. So I was always asked to sing things that I thought, “Well no, I really don’t think I should sing that now. I need to sing that maybe in five years, or maybe in 10 years, but not right now. Couldn’t I please sing something else?” And that became a difficulty for me. And after being at the opera house for three years, and singing Elsa and Elisabeth — the Wagner roles that are not sort of the heavy Wagner roles — and then Mozart operas that suited my voice at the time, I was continually invited to sing things that I just felt I shouldn’t. So I took it upon myself to go to speak with the artistic director to say that I thought I should leave the opera house, and come back in some years when my maturity sort of chronologically would have caught up with the invitations that I was being offered. Of course, considering that he’d taken me into the opera house when I knew one role, he wasn’t all that happy. I thought he’d say, “Oh, what a smart girl. Oh yes, absolutely. That’s what we’ll do.” No, no. He was absolutely furious.

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.

After four knee surgeries and hundreds of shots injected into my knee weekly to alleviate swelling and pain, my body is begging me to stop the pounding. My previous three surgeries were on my right knee. My most recent knee surgery took place this July and was on my left knee.

As hard as it's been to come to this decision, I am at peace with it. I have no regrets. I was not supposed to be here in the first place, remember? Not many people believed in my talent and my abilities, yet I found a way to persevere, to prove them (and sometimes myself!) wrong.