Serena Williams pulmonary embolism_Tennis star Serena Williams underwent "emergency treatment" after doctors discovered a blood clot in her lungs, People magazine reported.

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." Chabot also told the magazine the embolism was discovered after Williams returned to Los Angeles from New York "for doctor appointments for the ongoing issues with her foot."