Maria Sharapova extended her 2008 unbeaten run on Tuesday

Australian Open champion Maria Sharapova extended her 2008 unbeaten run on Tuesday, booking a quarter-final showdown with defending champion Daniela Hantuchova at the Pacific Life Open.

Sharapova, the fourth seed, escaped with a 6-2, 5-7, 6-4 victory over Ukrainian Alona Bondarenko, overcoming some erratic play to stretch her match-winning streak to 17. That run includes her Aussie Open triumph and a victory at Doha.

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