Serena Williams in blood clot scare

Serena Williams has undergone emergency treatment as a result of a blood clot in her lung, according to reports in the United States. The 29-year-old's spokesperson Nicole Chabot confirmed to People magazine she had had treatment on Monday for a haematoma, the result of a pulmonary embolism diagnosed last week.

"[On] Monday Serena Williams underwent emergency treatment for a haematoma she suffered as a result of treatment for a more critical situation," Chabot said. "Last week, Serena suffered from a pulmonary embolism which was discovered upon her return to LA."