(7) Jo-Wilfried Tsonga
Tsonga will have to rediscover both his form and fitness if he is to produce another great run at the Australian Open.
Melbourne Park remains the scene of the Frenchman's greatest Grand Slam success after he reached the final in 2008 as an unseeded entrant, prompting expectations of a glorious career for the then 23-year-old.
However, three semi-final appearances, one further Down Under and two at Wimbledon, represent the 28-year-old's best runs in the game's showcase events since that final loss to Novak Djokovic.
Tsonga also claimed his solitary Masters title back in 2008, while he boasts a final appearance in the 2011 ATP World Tour Finals, albeit amid a clearly fatigued field.
With a trophy cabinet comprised solely of titles gained on a hardcourt, the season's first major represents as a good of a chance as any for him to claim a maiden major title.
However, a hamstring problem has hampered his preparations, forcing him to pull out of the Hopman Cup and subsequently sit out the Sydney International.
Having slumped out in the second round of the US Open, Tsonga turned to Leyton Hewitt's former coach Roger Rasheed to help his quest to break the elite echelon of the game.
If Rasheed can add the work ethic of his former pupil to the undeniable talents of his current one, it may well be too soon to rule Tsonga out as a contender at Melbourne Park.