Sam Querrey beats Nicolas Mahut to reach his first grand slam quarter-final

• Novak Djokovic’s conqueror is victorious in straight sets
• Roger Federer through to last eight without dropping a setIn the hours after his stunning win against Novak Djokovic in the previous round, Sam Querrey watched every little rerun he could get his hands on, loving the moment. Having never gone beyond round four of a grand slam event, he was eager to enjoy it and as he began his last-16 match here on Monday, the fear of a let-down was obvious. But the American is determi