FILE - In this May 7, 2010 file photo, Serena Williams, of the United States, reacts during her semifinal tennis match against Serbia's Jelena Jankovic at the Italian Open tennis tournament in Rome. The 13-time Grand Slam champion spoke on NBC's "Today" show Wednesday, March 9, 2011, from Los Angeles, saying she hasn't left her house much since going to the hospital nearly three weeks ago. (AP Photo/Gregorio Borgia, File)
March 9, 2011 7:23:45 PM PST
NEW YORK (AP) - March 9, 2011 --
Serena Williams still has blood clots in her lung but hopes to return to tennis this summer after recovering from a pulmonary embolism, which she called the "scariest moment in my life."