Of course, drawing the heart in the clay at Roland Garros will always be a highlight for me, but also I remember him winning in Lisbon with his mother there, and pounding on his heart -- I always thought of him as "Coeur de Lion" after that. I also treasure the win against Max Mirnyi at the USO.
But, my private most favorite moment -- when there were no TV cameras around and not very many people either -- was a first round match at IW. It was the first time I saw Guga in person. He wasn't happy about the way he was playing, and all of a sudden, and quite shockingly for me, he raised his knee and broke his racket over his thigh. KERUNCH Broke it right in half. It was so unexpected. I had to look at the person next to me to be sure he had seen it too.
And then there was the late afternoon at the tournament when I was tired and I went high up in the empty stands and laid down on a riser and from the practice court below, I could hear Guga's moan/groan and the sound of him hitting the tennis ball. I just lay there perfectly relaxed and happy in the twilight listening to Guga.
Guga has given me more pure joy than anyone I have ever watched play.