Serena Williams Scared of Supplements

As questions continue over the news of Maria Sharapova testing positive for the recently banned drug meldonium, Serena Williams said that she doesn't take supplements herself.

"I don't. I'm terrified, to be honest. It would just be a really bad situation if that was me," Williams said Thursday afternoon. "Plus, my sister [Venus] went through a lot of illnesses and with her going through that, she was able to introduce me into a really vegan and raw, kind of really vegetable, whole raw world that I really enjoyed. And I was able to see a lot of benefits in my game and my body in general from that.

"Just even from a health perspective, I've never been a big fan of taking anything."

While Williams said she was "shocked" and as surprised as everyone else by the Sharapova news, Andy Murray said the news of another athlete doping was not shocking to him.

"The stories like this happen regularly now in sports -- it seems like it's almost a weekly occurrence. So I wouldn't say it was shocking, really," he said, adding, "I read that 55 athletes have failed tests for that substance since January 1st. You just don't expect high-level athletes at the top of many different sports to have heart conditions."

Asked what punishment Sharapova should receive for taking meldonium, Murray said: "That's not up to me to decide, but if you're taking performance-enhancing drugs and you fail the drug test, you have to get suspended."