Despite the heat reaching into the high 80s and extreme humidity, advances mostly came easily for the top players in the U.S. Open here Thursday.
Five-time champion and second-seeded Roger Federer waltzed through in straight sets over Steve Darcis of Belgium, 6-1, 6-2, 6-1, but he got a break with a night match.
His fellow Swiss player, Stan Wawrinka played for 3 hours 2 minutes in the heat of the day and managed to win in three tiebreakers. He beat Hyeon Chung of South Korea, in three sets, 7-6 (2), 7-6, (4), 7-6 (6).
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