Roddick turns on the power

World number one Andy Roddick blasted his way into the fourth round of the Australian Open today with a comprehensive straight-sets victory over fellow American Taylor Dent.

Roddick, who will now face Dutchman Sjeng Schalken in the last 16, joined fellow Americans Andre Agassi, James Blake and Robby Ginepri in advancing to the fourth round after his 6-2 6-0 6-2 victory.