(1) Victoria Azarenka
Azarenka returns to the scene of her maiden major title looking to reassert her dominance on the women's game.
The Belarusian's victory over Maria Sharapova in the Australian Open final was part of a 26-match winning streak to start 2012 that moved her to the top of the world rankings for the first time.
She cooled off as the year progressed and lost all five of her meetings against a resurgent Serena Williams, including the US Open final and Wimbledon semi-final.
Azarenka was due to meet Williams in the semi-final of her opening event of this season, the Brisbane International, but withdrew half-an-hour before the start due to an infection on the big toe on her right foot.
The problem developed after "a bad pedicure experience" and resulted in part of the nail having to be removed, but she is confident of being fully recovered for the start of the Australian Open.
The 23-year-old's game is best suited to hardcourts; she has powerful groundstrokes on both sides and an aggressive, first-strike mentality - all of which is accompanied by high-decibel shrieks.
Her tactics are not subtle - Plan A is to hit the ball hard from the baseline, Plan B is to stay put and try to hit it even harder.
Azarenka has regularly enjoyed herself in Melbourne, making it to at least the fourth round in each of the last four years.