Serena Williams returns a shot to Coco Vandeweghe during a match at the U.S. Open tennis tournament, Tuesday, Aug. 28, 2012, in New York. Williams won 6-1, 6-1. (AP Photo/Darron Cummings)

Photo by: Darron Cummings

Serena Williams returns a shot to Coco Vandeweghe during a match at the U.S. Open tennis tournament, Tuesday, Aug. 28, 2012, in New York. Williams won 6-1, 6-1. (AP Photo/Darron Cummings)