Agnieszka Radwanska beats Maria Sharapova at Sony Ericsson Open

Maria Sharapova and Agnieszka Radwanska

Agnieszka Radwanska beat world number two Maria Sharapova 7-5 6-4 to win the Sony Ericsson Open in Miami.

World number four Radwanska, 23, defeated the Russian at the Florida hardcourt championship to claim her ninth WTA title and her second of 2012.

Sharapova, 24, had held a 7-1 record against the Pole, and the defeat marks her fourth loss in the final at Miami.

Radwanska beat Venus Williams in the quarter-finals and Marion Bartoli in the semi-finals.

"You have to play six very good matches to win this tournament so I'm just extremely happy," said the Pole who won in Dubai in February.

While Radwanska celebrated her ninth career title and fourth since last summer, Sharapova's defeat follows a familiar pattern.

This was the third time in 2012 she has finished runner-up after losing the finals at the Austalian Open and Indiana Wells, both to Victoria Azarenka.

"It's always tough, because you do a really good job to get there," said Sharapova.

"It's obviously always the toughest round."

Radwanska's only defeats of the year have come against world number one Azarenka, and her counter-punching style induced a string of errors from her opponent.

Sharapova, who has finished as runner-up in the tournament in 2005, 2006 and 2011, ended the match with 45 unforced errors next to her name.

Radwanska faced down all three of the break points she faced and pounced late in each set to crack Sharapova's serve.

In the men's doubles final seventh seeds Leander Paes and Radek Stepanek beat Max Mirnyi and Daniel Nestor 3-6 6-1 10-8 to add to their Australian Open crown.

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