Peng Shuai of China eyes her serve to Maria Sharapova of Russia in their third round match at the China Open in Beijing on October 7, 2009. Peng defeated Sharapova 6-2, 6-4. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)

Peng Shuai of China celebrates winning match point against Maria Sharapova of Russia in the third round of the China Open in Beijing on October 7, 2009. Peng defeated Sharapova 6-2, 6-4. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)

Maria Sharapova of Russia eyes a backhand return to Peng Shuai of China in the third round match at the China Open in Beijing on October 7, 2009. Peng defeated Sharapova 6-2, 6-4. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)

BEIJING - OCTOBER 07: Maria Sharapova of Russia competes against Peng Shuai of China in her third round match during day six of the 2009 China Open at the National Tennis Centre on October 7, 2009 in Beijing, China. (Photo by Feng Li/Getty Images)

Peng Shuai of China eyes her forehand return to Maria Sharapova of Russia in the third round match at the China Open in Beijing on October 7, 2009. Peng defeated Sharapova 6-2, 6-4. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)

BEIJING - OCTOBER 07: Peng Shuai of China celebrates beating Maria Sharapova of Russia in her third round match during day six of the 2009 China Open at the National Tennis Centre on October 7, 2009 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - OCTOBER 07: Maria Sharapova of Russia returns a shot against Peng Shuai of China in her third round match during day six of the 2009 China Open at the National Tennis Centre on October 7, 2009 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - OCTOBER 07: Maria Sharapova of Russia returns a shot against Peng Shuai of China in her third round match during day six of the 2009 China Open at the National Tennis Centre on October 7, 2009 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - OCTOBER 07: Maria Sharapova of Russia competes against Peng Shuai of China in her third round match during day six of the 2009 China Open at the National Tennis Centre on October 7, 2009 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - OCTOBER 07: Maria Sharapova of Russia leaves after her defeat by Peng Shuai of China in her third round match during day six of the 2009 China Open at the National Tennis Centre on October 7, 2009 in Beijing, China. (Photo by Feng Li/Getty Images)

BEIJING - OCTOBER 07: Peng Shuai of China celebrates beating Maria Sharapova of Russia in her third round match during day six of the 2009 China Open at the National Tennis Centre on October 7, 2009 in Beijing, China. (Photo by Feng Li/Getty Images)

Peng Shuai of China eyes her forehand return to Maria Sharapova of Russia for match point in the third round of the China Open in Beijing on October 7, 2009. Peng defeated Sharapova 6-2, 6-4. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)

Maria Sharapova of Russia hits a backhand return against Peng Shuai of China in the third round of the China Open in Beijing on October 7, 2009. Peng defeated Sharapova 6-2, 6-4. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)

Peng Shuai of China reacts after winning a point against Maria Sharapova of Russia in the third round of the China Open in Beijing on October 7, 2009. Peng defeated Sharapova 6-2, 6-4. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)

Peng Shuai of China reacts after winning a point against Maria Sharapova of Russia in the third round of the China Open in Beijing on October 7, 2009. Peng defeated Sharapova 6-2, 6-4. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)

Peng Shuai of China hits a backhand return against Maria Sharapova of Russia in the third round of the China Open in Beijing on October 7, 2009. Peng defeated Sharapova 6-2, 6-4. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)

Maria Sharapova of Russia (L) leaves the court following her defeat to Peng Shuai of China (R) in the third round of the China Open in Beijing on October 7, 2009. Peng defeated Sharapova 6-2, 6-4. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)

Peng Shuai of China celebrates winning match point against Maria Sharapova of Russia in the third round of the China Open in Beijing on October 7, 2009. Peng defeated Sharapova 6-2, 6-4. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)

Peng Shuai of China celebrates winning a match point against Maria Sharapova of Russia in the third round of the China Open in Beijing on October 7, 2009. Peng defeated Sharapova 6-2, 6-4. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)

Peng Shuai of China celebrates winning a match point against Maria Sharapova of Russia in the third round of the China Open in Beijing on October 7, 2009. Peng defeated Sharapova 6-2, 6-4. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)

Maria Sharapova of Russia retrieves a ball during a second round match against Peng Shuai of China at China Open 2009, at the National Tennis Center in Beijing on October 7, 2009. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC BROWN/AFP/Getty Images)

Maria Sharapova of Russia returns a shot against Peng Shuai of China during the second round match at China Open 2009, at the National Tennis Center in Beijing on October 7, 2009. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC BROWN/AFP/Getty Images)

Maria Sharapova of Russia returns a shot against Peng Shuai of China during the second round match at China Open 2009, at the National Tennis Center in Beijing on October 7, 2009. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC BROWN/AFP/Getty Images)

Maria Sharapova of Russia returns a shot against Peng Shuai of China during the second round match at China Open 2009, at the National Tennis Center in Beijing on October 7, 2009. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC BROWN/AFP/Getty Images)

Peng Shuai of China returns a shot against Maria Sharapova of Russia during the second round match at China Open 2009, at the National Tennis Center in Beijing on October 7, 2009. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC BROWN/AFP/Getty Images)

Maria Sharapova of Russia walks past Peng Shuai of China during the second round match at China Open 2009, at the National Tennis Center in Beijing on October 7, 2009. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC BROWN/AFP/Getty Images)

Maria Sharapova of Russia returns a shot against Peng Shuai of China during the second round match at China Open 2009, at the National Tennis Center in Beijing on October 7, 2009. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC BROWN/AFP/Getty Images)

Maria Sharapova of Russia returns a shot against Peng Shuai of China during the second round match at China Open 2009, at the National Tennis Center in Beijing on October 7, 2009. AFP PHOTO/Frederic J. BROWN (Photo credit should read FREDERIC BROWN/AFP/Getty Images)

Maria Sharapova of Russia returns a shot against Victoria Azarenka of Belarus during the second round match at China Open 2009, at the National Tennis Center in Beijing on October 6, 2009. Sharapova beat Azarenka 6-3, 6-7, 6-5. AFP PHOTO/LI XIN (Photo credit should read li xin/AFP/Getty Images)

Maria Sharapova of Russia returns a shot against Victoria Azarenka of Belarus during the second round match at China Open 2009, at the National Tennis Center in Beijing on October 6, 2009. Sharapova beat Azarenka 6-3, 6-7, 6-5. AFP PHOTO/LI XIN (Photo credit should read li xin/AFP/Getty Images)