Australian Open women’s final

Li Na, the sixth-seeded player from China, returns a shot in her third Grand Slam championship match.  (Peter Parks / AFP / Getty Images)

Victoria Azarenka puts her power into a backhand during the championship match against Li Na.  (Paul Crock / AFP / Getty Images)

Li Na, who won the French Open last year, is in pain after turning her ankle for a second time and hitting her head on the ground during the women’s final against Victoria Azarenka.  (Paul Crock / AFP / Getty Images)

Li Na is checked by a doctor after hitting her head on the court when she fell after rolling her left ankle for a second time in the Australian Open final.  (Barbara Walton / EPA)

Li Na returns a forehand shot against Victoria Azarenka in the women’s final on Saturday.  (Paul Crock / AFP / Getty Images)

Victoria Azarenka, who would have surrendered her top ranking in the world to Serena Williams had she lost to Li Na, gets set to hit a backhand in the Australian Open final.   (Peter Parks / AFP / Getty Images)

Li Na limps as she gets to her feet after twisting her left ankle in the fifth game of the second set Saturday.  (Narendra Shrestha / EPA)