MELBOURNE, Jan. 21 (UPI) -- World No. 1 Roger Federer won his 33rd consecutive match with a victory Sunday that boosted him into the quarterfinals of the Australian Open.
Federer swept past 14th-seeded Novak Djokovic 6-2, 7-5, 6-3 in fourth-round play of the year's first Grand Slam event. The defending Australian Open champion goes against seventh-seeded Tommy Robredo, who needed a fourth set Sunday to get past Richard Gasquet 6-4, 6-2, 3-6, 6-4.
Sixth-seeded Andy Roddick also advanced to the quarterfinals, although No. 9 Mario Ancic pushed him to a 6-3, 3-6, 6-1, 5-7, 6-4 decision that took three hours. Mardy Fish knocked out 16th-seeded David Ferrer 6-1, 7-6 (7-4), 2-6, 7-5 on Sunday and is paired against Roddick in the next round.