Murray muscles through to US Open third round

World number two Andy Murray made himself heard at the US Open on Thursday, downing tenacious Spaniard Marcel Granollers in straight sets to reach the third round. With pounding rain creating a din under the new $150 million roof of the Arthur Ashe stadium, Murray battled through a tense first set to triumph 6-4, 6-1, 6-4. "We're lucky that we get to play under the roof because otherwise there'd be no tennis," said Murray, whose match went on as all action stopped on the outside courts.