After a year of closed-door meetings with tennis players seeking a greater say in the sport and a larger slice of Grand Slam revenues, the U.S. Open is making big changes. Roger Federer, of Switzerland, returns a shot to Rafael Nadal, of Spain, during their match at the BNP Paribas Open tennis tournament, Thursday, March 14, 2013, in Indian Wells, Calif. Rafael Nadal, right, of Spain, returns a shot to Roger Federer, of Switzerland, during their match at the BNP Paribas Open tennis tournament, Thursday, March 14, 2013, in Indian Wells, Calif.