Azarenka rebounded from a poor second set to record a hotly contested 7-6 (8-6), 2-6, 6-3 victory over Williams, who -- thanks to her victory in Friday's quarterfinal -- will replace the Belarusian as the world's top-ranked player in this week's rankings.
Azarenka, however, showed her mettle Sunday as she ran her season's record to 14-0 while breaking a nine-match losing streak to Williams.
She improved to 2-11 lifetime mark against the American, winning for the first time since the pair met in the final of the 2009 event in Miami.
Man spent 15 hours in jail for plugging electric car into an outlet at a school
Gal Gadot cast as Wonder Woman for 'Batman vs. Superman'