01/21/2012 07:55 EST | Updated 03/22/2012 05:12 EDT

Hewitt beats Raonic to reach Round of 16 in his 16th Australian Open

MELBOURNE, Australia - Former No. 1-ranked Lleyton Hewitt reached the Round of 16 in his 16th Australian Open after beating No. 23-seeded Canadian Milos Raonic 4-6, 6-3, 7-6 (5), 6-3 in a Saturday night match.

Hewitt, who hasn't won a major since Wimbledon in 2002, entered the tournament on a wild card after slumping to a ranking in the 180s during an injury-marred 2011.

He fended off Cedrik-Marcel Stebe in the first round and was leading Andy Roddick by two sets to one when the American retired with a hamstring injury in their second-round match.

The 21-year-old Raonic is one of the emerging players on the tour after rising 125 places last year.

He reached the fourth round at Melbourne Park in his last outing and started 2012 by winning the Chennai title without dropping a service game.