Rafael Nadal into fourth round of Masters Series 1000 at Nadal after a walkover . I 'm Nadal will play Ernests Gulbis of Latvia for a quarterfinal berth in hard-court event . Roger Federer also through to Saturday beat last year 's , where he will play Stanislas Wawrinka . Top women 's seed Victoria Azarenka battles through after losing fourth set .
Rafael Nadal into fourth round of Masters Series 1000 at Nadal after a walkover . Nadal will play Ernests Gulbis of Latvia for a quarterfinal berth in hard-court event . Roger Federer also through to Saturday beat last year 's , where he will play Stanislas Wawrinka . Top women 's seed Victoria Azarenka battles through after losing fourth set .