Advantage Hamilton in first U.S. GP practice

By Alan Baldwin AUSTIN, Texas (Reuters) - Lewis Hamilton made a quick start to his U.S. Grand Prix preparations with the fastest time in first Friday practice for a key race in the title battle with Mercedes team mate and championship leader Nico Rosberg. Rosberg, the title favourite who leads the Briton by 33 points with four races remaining, was second on the timesheets and 0.315 slower. Hamilton has won three of the last four races in Austin, taking his third title at the Texan track last yea