Radwańska reached the quarterfinals of the 2009 Medibank International Sydney, losing in three sets to eventual champion Elena Dementieva.
She was defeated in the first round of the Australian Open by Kateryna Bondarenko.

At the BNP Paribas Open, she defeated Samantha Stosur and Aleksandra Wozniak en route to the quarterfinals, where she lost to Anastasia Pavlyuchenkova.
At the Sony Ericsson Open, she lost a three-set fourth-round match to Venus Williams.
She reached the fourth round of the French Open, falling in three sets to eventual champion Svetlana Kuznetsova.
She and Urszula also reached the quarterfinals in doubles.
She went on to reach her second consecutive quarterfinal at Wimbledon, falling to Venus Williams.

She reached her first semifinal of the 2009 season in Tokyo, where she fell in three sets to eventual champion Maria Sharapova.
She reached her first final of the year in China, losing in straight sets to Svetlana Kuznetsova.

Radwańska and her doubles partner Maria Kirilenko reached the semifinals of the 2010 Australian Open, losing to the world No.
1 pairing of Cara Black and Liezel Huber in three sets.
In Indian Wells, Radwańska won her fifth straight match against Marion Bartoli, and went on to upset Elena Dementieva in the quarterfinals before losing to Caroline Wozniacki in the semifinals.
Radwańska entered the 2010 Sony Ericsson Open, where she was defeated in the quarterfinals by Venus Williams.
At Wimbledon, she was defeated in the fourth round by Li Na, whom she had beaten at the same stage the previous year.

Radwańska reached the final of the Mercury Insurance Open, falling to Svetlana Kuznetsova.
Due to a stress fracture in her foot, Radwańska's 2010 season ended at the China Open, where she lost a three-set match to Angelique Kerber.
Radwańska subsequently finished 2010 outside the top 10.
Radwańska reached the quarterfinals of the 2009 Medibank International Sydney, losing in three sets to eventual champion Elena Dementieva. She was defeated in the first round of the Australian Open by Kateryna Bondarenko.
At the BNP Paribas Open, she defeated Samantha Stosur and Aleksandra Wozniak en route to the quarterfinals, where she lost to Anastasia Pavlyuchenkova. At the Sony Ericsson Open, she lost a three-set fourth-round match to Venus Williams. She reached the fourth round of the French Open, falling in three sets to eventual champion Svetlana Kuznetsova. She and Urszula also reached the quarterfinals in doubles. She went on to reach her second consecutive quarterfinal at Wimbledon, falling to Venus Williams.
She reached her first semifinal of the 2009 season in Tokyo, where she fell in three sets to eventual champion Maria Sharapova. She reached her first final of the year in China, losing in straight sets to Svetlana Kuznetsova.
Radwańska and her doubles partner Maria Kirilenko reached the semifinals of the 2010 Australian Open, losing to the world No. 1 pairing of Cara Black and Liezel Huber in three sets. In Indian Wells, Radwańska won her fifth straight match against Marion Bartoli, and went on to upset Elena Dementieva in the quarterfinals before losing to Caroline Wozniacki in the semifinals. Radwańska entered the 2010 Sony Ericsson Open, where she was defeated in the quarterfinals by Venus Williams. At Wimbledon, she was defeated in the fourth round by Li Na, whom she had beaten at the same stage the previous year.
Radwańska reached the final of the Mercury Insurance Open, falling to Svetlana Kuznetsova. Due to a stress fracture in her foot, Radwańska's 2010 season ended at the China Open, where she lost a three-set match to Angelique Kerber. Radwańska subsequently finished 2010 outside the top 10.
Agnieszka Radwańska