People.com is reporting that tennis star Serena Williams suffers from a pulmonary embolism.

The 29-year-old athlete has been spotted at Cedars-Sinai Medical Center in Los Angeles a number of the times in the past week. People.com reports that Williams's rep, Nicole Chabot, confirmed the athlete's heath status.

Monday Serena Williams underwent emergency treatment at Cedars for a hematoma she suffered as a result of treatment for a more critical situation, that rep told People.com.

Last week, Serena suffered from a pulmonary embolism [a blood clot in the lungs] which was discovered upon her return to L.A. She had been in New York for doctor appointments for the ongoing issues with her foot. Doctors are continuing to monitor her situation closely to avoid additional complications.

The tennis star was last seen Sunday night at Elton John's Aids Foundation Academy Award Viewing Party.