News Djokovic Retires in Pain as Serbia Loses Davis Cup Semifinal – By - 19 September 2011 http://www.nytimes.com/2011/09/19/sports/tennis/djokovic-retires-in-pain-as-serbia-loses-davis-cup-semifinal.html?_r=1&adxnnl=1&adxnnlx=1316393617-msI9PEkJsagnUfX0ouAn2Q
