While Serena Williams is fixated on number 23, Madison Keys is just focusing on number one.
원문출처 : http://www.cnn.com/2016/11/16/tennis/tennis-serena-williams-madison-keys-evert-navratilova/index.html
원문출처 : http://www.cnn.com/2016/11/16/tennis/tennis-serena-williams-madison-keys-evert-navratilova/index.html