FILE - In this Aug. 16, 2012, file photo, Serena Williams returns a shot to Urszula Radwanska, of Poland, during a match at the Western & Southern Open tennis tournament in Mason, Ohio. Call it mental gymnastics, a creative way of looking at things or whatever else might apply. In an Olympic year, the U.S. Open _ scheduled to begin on Monday, Aug. 27, and considered the toughest test in tennis even under normal circumstances _ is essentially the season's fifth major, causing many top players to double down on their fitness and reorganize their schedules to prepare for what they hope will be a two-week grind in the fishbowl that is Flushing Meadows. (AP Photo/Tom Uhlman, File)