Pennetta enjoying Grand Slam success past 30

Flavia Pennetta of Italy bites the net in frustration during her fourth round match against Angelique Kerber of Germany at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 19, 2014.(AP Photo/Eugene Hoshiko)

Flavia Pennetta of Italy bites the net in frustration during her fourth round match against Angelique Kerber of Germany at the Australian Open tennis championship in Melbourne, Australia, Sunday, Jan. 19, 2014.(AP Photo/Eugene Hoshiko)

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