Andy Roddick returns a shot against Dmitry Tursunov of Russia during the third round of the Sony Ericsson Open at the Crandon Park Tennis Center in Key Biscayne, Florida. Roddick powered into the fourth round of the nine million-dollar ATP and WTA hardcourt event here Sunday by defeating Russia's Dmitry Tursunov 7-6 (11/9), 6-2.