World number one Novak Djokovic barely worked up a good sweat on another sizzling day at the US Open as he strolled past Paul-Henri Mathieu 6-1, 6-3, 6-0 and into the third round of the year's final grand slam.
Djokovic, who has reached the Flushing Meadows final each of the last four years and won it all in 2011, needed just 88 minutes to dismiss the veteran Frenchman on a gusty Arthur Ashe Stadium court.
Things should get tougher in the third round where the Serb will run into big-hitting American Sam Querrey, who advanced with a 6-3, 6-4, 6-4 win over 28th seed Guillermo Garcia-Lopez of Spain.
Meanwhile, eighth-seed Andy Murray, who overcame cramping in his first-round victory, roared past unseeded German Matthias Bachinger 6-3, 6-3, 6-4.
The Briton, never broken in the one hour 46-minute match, ripped 36 winners, more than doubling the 17 unforced errors he was charged with.
Murray will next meet Russian Andrey Kuznetsov, who eliminated 31st seed Fernando Verdasco of Spain in five sets 6-3, 4-6, 4-6, 7-5, 6-3.