MELBOURNE, AUSTRALIA - JANUARY 26: Victoria Azarenka of Belarus celebrates winning championship point after winning her women's final match against Na Li of China during day thirteen of the 2013 Australian Open at Melbourne Park on January 26, 2013 in Melbourne, Australia. (Photo by Michael Dodge/Getty Images)

Melbourne – Victoria Azarenka retained her Australian Open title with a tense 4-6 6-4 6-3 victory over China's Li Na, who suffered a sickening ankle injury in the second set and hit her head in the third when she twisted the joint for a second time.

Li had dominated the first set on Saturday but Azarenka raced out to a 3-1 lead in the second before Li slipped and twisted her left ankle. She had it strapped but had problems pivoting and Azarenka won the set 6-4.

The Chinese sixth seed, who won the French Open title in 2011, had taken a 2-1 lead in the decider before a fireworks display delayed play for about 10 minutes and she immediately went over her ankle again when they returned and hit her head.

A smiling Li returned to court but Azarenka managed to break in the fifth game, then hold serve to jump to a 4-2 lead and she sealed the title, which ensured she retained the No 1 ranking, when she broke Li in the ninth game. – Reuters