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2-time former champ Ana Ivanovic pulls out of Generali Ladies with hip injury

Ana Ivanovic of Serbia returns a shot against Maria Sharapova of Russia during the semi final match of the China Open tennis tournament at the National Tennis Stadium in Beijing, China, Saturday, Oct. 4, 2014. (AP Photo/Vincent Thian)

Ana Ivanovic of Serbia returns a shot against Maria Sharapova of Russia during the semi final match of the China Open tennis tournament at the National Tennis Stadium in Beijing, China, Saturday, Oct. 4, 2014. (AP Photo/Vincent Thian)  (The Associated Press)

Ana Ivanovic pulled out of the Generali Ladies with a left hip injury on Wednesday, one day after receiving medical treatment during her first-round win over Pauline Parmentier of France.

In a statement on the tournament website, the two-time former champion from Serbia says, "This injury has been plaguing me the whole summer, and it got worse during the recent tournaments in Asia. I am sorry but I can't play on."

Ivanovic, who was seeded second, defeated Parmentier 6-3, 6-2 but asked for a medical time-out while trailing 2-1 in the second set.

The eighth-ranked Ivanovic, who won the indoor hard-court event in Austria in 2008 and 2010 and reached the final last year, has qualified for the WTA Finals in Singapore in November.