World No . 1 , and the United States is not a signatory to that treaty. Azarenka led 3-0 in the second set , then sixth-ranked Li went over on her ankle after winning the next game . Belorussian beats crowd favorite and 2011 runner-up Li Na 4-6 6-4 6-3 in Melbourne . Li needs two medical breaks while final also disrupted by Australia Day fireworks . Azarenka holds onto the No . 1 ranking , denying Serena Williams top spot .
World No . 1 , and the United States is not a signatory to that treaty. Belorussian beats crowd favorite and 2011 runner-up Li Na 4-6 6-4 6-3 in Melbourne . Li needs two medical breaks while final also disrupted by Australia Day fireworks . Azarenka holds onto the No . 1 ranking , denying Serena Williams top spot .