(13) Ana Ivanovic
Ivanovic's run to the quarter-finals of last year's US Open was the first time she'd reached the last eight any Grand Slam since her French Open success in 2008 so she'll be aiming to at least repeat the feat in Melbourne.
The Serb, who beat fellow countrywoman Jelena Jankovic to the title at Roland Garros before becoming world number one the following month, suffered a spectacular dip in form through a combination of injuries and loss of confidence.
She finished 2011 at 22nd in the world rankings but 12 months later she had climbed up to 13 thanks to a largely encouraging season, which included her four victories at Flushing Meadows.
The 25-year-old progressed to the last 16 at last year's Australian Open but her best performance Down Under came back in 2008 when she finished runner-up to Maria Sharapova.
When at the top of her game, Ivanovic combines her powerful groundstrokes with aggressive tactics but this high-risk strategy can also lead to lots of unforced errors and there is rarely a middle ground.