Article Photos: Federer, Azarenka advance at Indian Wells

Samantha Stosur, of Australia, returns a shot against Peng Shuai, of China, during their match at the BNP Paribas Open tennis tournament, Monday, March 11, 2013, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)

Samantha Stosur, of Australia, returns a shot against Peng Shuai, of China, during their match at the BNP Paribas Open tennis tournament, Monday, March 11, 2013, in Indian Wells, Calif. (AP Photo/Mark J. Terrill)