World No . 1 Roger Federer through to the last 16 of the the Sydney Olympics singles tournament . He and Swiss partner Andy Roddick win opening match of their doubles title defense . World No . 2 Federer and doubles partner Stanislas Wawrinka had a battle in the opening match of their title defense , coming from behind to beat Japan 's Kei Nishikori and Go Soeda 6-7 ( 5-7 ) 6-4 6-4 late in the evening . Novak Djokovic loses in his first -round doubles match alongside Novak Djokovic . The Swiss will play Andy Roddick in round 2 of the singles after the American wins .
World No . 1 Roger Federer through to the last 16 of the the Sydney Olympics singles tournament . He and Swiss partner Andy Roddick win opening match of their doubles title defense . World No . 2 Novak Djokovic loses in his first -round doubles match alongside Novak Djokovic . The Swiss will play Andy Roddick in round 2 of the singles after the American wins .