Result: Janko Tipsarevic retires, Nicolas Almagro advances

Serbia's Janko Tipsarevic and Nicolas Almagro shake hands after Tipsarevic retired injured in the fourth round of the Australian Open tennis championship on January 20, 2013
© AP Photos
Janko Tipsarevic's retirement sees Nicolas Almagro go on to face David Ferrer in an all-Spanish quarter-final at the Australian Open.

Janko Tipsarevic has been forced to retire in the second set of his Australian Open fourth-round encounter with Nicolas Almagro.

The Serb - who has endured two gruelling five-setters this week - was a set and two breaks down, but had been severely hampered by an injury to his left foot, which required heavy strapping.

Almagro was in control from an early stage, securing two breaks of serve on his way to wrapping up the set 6-2.

The Spaniard then broke early in the second to take full control of the contest.

Tipsarevic did force a break point in the second set, but could not profit from it. The world number nine called it a day after Almagro moved 5-1 in front.

The 10th seed will now face David Ferrer in the last eight.

Spain's David Ferrer celebrates winning his fourth round match at the  Australian Open tennis championship on January 20, 2013
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3Switzerland Roger Federer7,145
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10Canada Milos Raonic3,230
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12France Jo-Wilfried Tsonga2,770
13Belgium David Goffin2,560
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