Sharapova @ US Open

Young tennis fans try to get autographs from Maria Sharapova, of Russia, after winning her match against Mallory Burdette in the third round of play at the 2012 US Open tennis tournament, Friday, Aug. 31, 2012, in New York. (AP Photo/Mike Groll)

Maria Sharapova, of Russia, reacts after winning her match against Mallory Burdette in the third round of play at the 2012 US Open tennis tournament, Friday, Aug. 31, 2012, in New York. Sharapova won the match. (AP Photo/Mike Groll)

Maria Sharapova, of Russia, serves to Mallory Burdette in the third round of play at the 2012 US Open tennis tournament, Friday, Aug. 31, 2012, in New York. (AP Photo/Mike Groll)

Maria Sharapova, of Russia, returns a shot to Mallory Burdette in the third round of play at the 2012 US Open tennis tournament, Friday, Aug. 31, 2012, in New York. (AP Photo/Mike Groll)

Maria Sharapova, of Russia, returns a shot to Mallory Burdette in the third round of play at the 2012 US Open tennis tournament, Friday, Aug. 31, 2012, in New York. (AP Photo/Mike Groll)

Maria Sharapova, of Russia, returns a shot to Mallory Burdette in the third round of play at the 2012 US Open tennis tournament, Friday, Aug. 31, 2012, in New York. (AP Photo/Mike Groll)

Maria Sharapova, of Russia, serves to Lourdes Dominguez Lino, of Spain, during a match at the U.S. Open tennis tournament, Wednesday, Aug. 29, 2012, in New York. (AP Photo/Darron Cummings)

Maria Sharapova, of Russia, serves to Lourdes Dominguez Lino, of Spain, in the second round of play at the U.S. Open tennis tournament, Wednesday, Aug. 29, 2012, in New York. (AP Photo/Charles Krupa)

Maria Sharapova, of Russia, returns a shot to Lourdes Dominguez Lino, of Spain, during a match at the U.S. Open tennis tournament, Wednesday, Aug. 29, 2012, in New York. (AP Photo/Darron Cummings)

Maria Sharapova, of Russia, returns to Lourdes Dominguez Lino, of Spain, in the second round of play at the U.S. Open tennis tournament on Wednesday, Aug. 29, 2012 in New York. (AP Photo/Charles Krupa)

Maria Sharapova, of Russia, returns a shot to Melinda Czink, of Hungary, during the first round of play at the 2012 US Open Tennis tournament, Monday, Aug. 27, 2012, in New York. (AP Photo/Mike Groll)