In the sweltering heat of New York the British number one showed precision and power in dismantling the game of the Slovakian world number 71, 6-3 6-2 6-2.

Murray will next face Dustin Brown of Jamaica for a place in the third round.

"I managed to get through in straight sets so I'm pleased, but it was a lot tougher than the score suggests," said Murray.

Elsewhere in the men's draw, Czech Tomas Berdych fell to a shock defeat at the hands of French veteran Michael Llodra in straight sets. Llodra winning 7-6(3) 6-4 6-4.