STANFORD — Dominika Cibulkova stepped up her aggression and power after losing the first set and upset top seed Agnieszka Radwanska 3-6, 6-4, 6-4 in the Bank of the West Classic championship match Sunday.

Cibulkova repeatedly pounced on Radwanska's weak second serve to even the match, and then rallied from a 4-2 deficit after being down a break in the third set.

After squaring the match at 4-4, Cibulkova broke Radwanska by hitting winners on two slow second serves at 65 and 67 mph. The 24-year-old Slovakian then served out the match, but it required a 15-point marathon game in which Radwanszka fended off four match points before Cibulkova closed a long final point with a hard backhand shot the world's fourth-ranked player couldn't return.

It was Cibulkova's third career victory on the Women's Tennis Assn. tour and the first this year for the world's 21st-ranked player. In her only other final in 2013 in January, she lost to Radwanszka 6-0, 6-0 in Sydney, Australia.

Radwanska, also 24, saw her record in WTA finals drop to 12-5 as she lost to Cibulkova for the first time in four career matches.



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