Serena mentions MONICA in her post match interview! GRUNTS!
Q. Much has been made about the decibel level of the grunts, especially around the Grand Slam time. Why do you grunt, and how does it change throughout a match?
SERENA WILLIAMS: Uhm, I grunt I don't know. I just, honestly, when I was younger I used to love Monica Seles, she was like my role model. I loved her game. I loved her grunt. So my grunt is kind of like hers a little bit where it's like a double grunt, instead of just like one long one, it's like two of them.
I don't know why I grunt. Grunting actually is a way of breathing. That's
how I'm breathing out instead of going... I'm actually grunting to get the air out.