NEW YORK  — Tennis star Serena Williams underwent “emergency treatment” after doctors discovered a blood clot in her lungs.

Spokeswoman Nicole Chabot told the magazine that Williams “underwent emergency treatment for a hematoma suffered as a result of treatment for a more critical situation.”

Williams suffered from a pulmonary embolism last week. The 29-year-old Williams is being treated at a Los Angeles hospital.

“Doctors are continuing to monitor her situation closely to avoid additional complications.”