Serena Williams Talks About Medical Scare

The tennis superstar discusses that day as she prepares to return to the court in California.
1:51 | 07/30/14

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Transcript for Serena Williams Talks About Medical Scare
Ain't that the truth. Ry kidkick -- ridiculously cute baby. Serena Williams' frightening exit from wimbledon. Is not sure what was wrong. ABC's Paula Faris has her story. Something is not right with Serena. Reporter: It was a shocking scene from Serena Williams. I consider this dangerous. She should not be playing. Unsteady, disoriented. Fumbling the tennis ball playing a doubles match with sister Venus at wimbledon. She was walking off the court. I think she almost punched me. Reporter: Now one month later, Serena explaining for the first time how dire that day was as she prepares to return to the court today in California. I mean, I was really, really sick and I just literally the next three days I couldn't get out of bed. She leaves the court in tears. Her sister's got her hand. Taking her off. There's all these question, what in the world is going on. Reporter: At the time tournament officials said she was suffering from a virus but her bizarre on-court behavior left many to wonder if it was possibly related to her sister Venus' Sjogren's syndrome. I have to get a lot of tests run because of things that run in the family. Reporter: Her coach ignited the controversy by telling France's "Tennis" magazine Serena is in a difficult phase, but I will leave it there. She has a history of a blood clot. So she has her own medical history and she is not going to take any chances with her body or her health. It's just like, Serena, take your time. You know, you have the rest of your life to keep playing tennis hopefully. Reporter: For "Good morning America," Paula Faris, ABC news, New York.

This transcript has been automatically generated and may not be 100% accurate.

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