Jo-Wilfried Tsonga

Age: 27

Nation: France

World ranking: 8

2012 Australian Open: Fourth round

Arriving at Melbourne Park, Jo-Wilfried Tsonga will return to the scene where he shot to fame way back in 2008. Unseeded at that year's Australian Open, the Frenchman stormed his way to the final, knocking out four seeded players along the way, including a straight-sets win over Rafael Nadal in the semi-finals. Entertainingly acrobatic on the court, Tsonga will need to add the discipline to his game that was missing for much of 2012, as well as shake off a hamstring injury picked up during the Hopman Cup in early January, if he wants to repeat his 2008 performance.