FED SCRAPES BY BERDYCH

World number two Roger Federer fought back from two sets down to snatch a dramatic 4-6 6-7 6-4 6-4 6-2 victory against Tomas Berdych Sunday, retaining his hopes of winning a 14th grand slam title at the Australian Open.

Federer, who is seeking to equal Pete Sampras's record for grand slam titles, appeared listless from the beginning of his fourth round match with the Czech, before he found his form in the middle of the third set and never looked back.

The Swiss second seed had numerous opportunities to seal decisive games in each of the opening sets but the 20th-seeded Berdych managed to find a booming serve, blistering return or a winner to halt Federer's momentum.

However, after Berdych missed a smash while 3-4 down in the third, Federer seized the initiative and drastically raised his game to take the match in three hours, 29 minutes, setting up a quarter-final with Argentine Juan Martin Del Potro.