A fired-up Maria Sharapova strained her vocal chords to exhaustion as she fought off a stiff challenge from German Julia Goerges to advance to the fourth round of the Australian Open on Friday.

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Pumping her fist and bellowing "c'mon!", the former world number one dug herself out of a first-set hole and survived a late match wobble before sealing the match 4-6 6-4 6-4 with a thumping serve in a shade under two and half hours.
The 2008 champion, Sharapova surrendered her serve in a bout of nerves after taking a 4-1 lead in the final set, but held on grimly to have a chance of raising her second title at Melbourne Park.
She will next play the winner of Venus Williams and Andrea Petkovic.
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