Agnieszka Radwanska on song
Agnieszka Radwanska continued her charge at the Apia International in Sydney with a straight-sets win over Li Na.
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The Polish top seed made sure of her place in the final with a 6-3 6-4 victory to end Li's unbeaten start to 2013.
Radwanska was given a thorough workout as Li saved seven match points in a late challenge, but the win was eventually sealed after 92 minutes.
She will take on Dominika Cibulkova in the final after the Slovakian dispatched second seed Angelique Kerber 6-2 4-6 6-3.
In the men's event, home favourite Bernard Tomic advanced to the last four with a battling 6-7 (6/8) 6-4 6-2 win over Jarkko Niemenen of Finland.
Tomic is joined in the semis by third seed Andreas Seppi after the Italian ground out a 6-4 7-5 victory over Marcel Granollers.
South African Kevin Anderson will face Julien Benneteau of France in the other semi-final.
Anderson was a 6-4 6-3 winner over Denis Istomin in the quarter-finals, while Benneteau beat Ryan Harrison 6-4 6-2.