Tennis star Serena Williams suffered a pulmonary embolism Monday and was rushed into emergency surgery, her rep told PEOPLE.

"Monday Serena Williams underwent emergency treatment at Cedars for a hematoma she suffered as a result of treatment for a more critical situation," her rep, Nicole Chabot, said in a statement.

Williams, 29, looked fabulous on the red carpet at Sunday's Elton John AIDS Foundation Academy Awards Viewing Party, just days after serveral sighting at Cedars-Sinai Medical Center. Chabot confirmed the famed tennis player's injury after Monday's scary ordeal.