Radwanska sees off Vinci challenge
Top seed Agnieszka Radwanska gained revenge for her US Open defeat to Roberta Vinci with a straight-sets victory over the Italian in the quarter-final of the Apia International in Sydney.
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The Pole, the world number four, clinched a 6-4 7-5 win in one hour 34 minutes, battling back from 3-1 down in the second set.
Radwanska, who was knocked out of the US Open in the fourth round by Vinci last summer, saved seven of the eight break points she faced on her way to victory.
"She (Vinci) pretty much doesn't miss and everything goes back to the other side, she's not giving up any free points," Radwanska said on the WTA website.
"So today I was really trying to play more aggressive and come to the net more often, even serve and volley sometimes. I think that was the key of the match today."
Second seed Angelique Kerber of Germany also made it through to the last four thanks to a 6-3 7-5 success over Russia's Svetlana Kuznetsova.
Third-seeded Italian Sara Errani crashed out, though, thumped 6-2 6-1 by Slovakia's Dominika Cibulkova.
Li Na, the Chinese fourth seed, had to come from a set down to see off American qualifier Madison Keys 4-6 7-6 (7/2) 6-2.