Washington PostSerena Williams undergoes emergency surgery: reportReutersNEW YORK (Reuters) - Serena Williams is recovering in a Los Angeles hospital after undergoing emergency treatment for a blood clot in her lungs, People magazine reported on Wednesday. Tennis officials were unable to confirm the report but a ...Serena Williams hospitalized after pulmonary embolismUSA TodaySerena undergoes blood clot operationCNN InternationalReport: S.