Updated On: 14 January, 2013 09:35 AM IST | | AFP
A feisty Lleyton Hewitt yesterday warned his Australian Open first round opponent Janko Tipsarevic that he plans to "knock him off" after showing vintage form to win the Kooyong Classic
The tenacious veteran, 31, is bursting with confidence after demolishing Juan Martin Del Potro in the final of the warm-up tournament 6-1, 6-4 on Saturday, his third victory over top-15 opposition in the past week.

Lleyton Hewitt