U.S. Open Day 2Updated 2248 GMT (0648 HKT) September 1, 2015 Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds. Photos: Roger Federer moved into a third place tie for men's victories at the U.S. Open after crushing Leonardo Mayer in the first round Tuesday. Hide Caption 1 of 9 Photos: Federer, who has never lost in the first round in New York, won 84% of his first-serve points. Hide Caption 2 of 9 Photos: Simona Halep, the women's No. 2 seed, played about a set and a half before her opponent, Marina Erakovic, retired with a knee injury. Hide Caption 3 of 9 Photos: Caroline Wozniacki has plenty of points to defend, given she made last year's final. The Dane on Tuesday began well, dropping two games against wildcard Jamie Loeb. Hide Caption 4 of 9 Photos: But French Open finalist Lucie Safarova made a quick exit, falling to the dangerous Lesia Tsurenko in two sets. Hide Caption 5 of 9 Photos: Tsurenko of Ukraine has climbed the rankings recently and won her first title in Turkey in July. Hide Caption 6 of 9 Photos: The heat wave in New York took its toll on Aussie Thanasi Kokkinakis, who had to retire against Richard Gasquet in the fifth set due to cramps. Hide Caption 7 of 9 Photos: Donald Young stunned No. 11 seed Gilles Simon, rallying from two sets and a break down. Hide Caption 8 of 9 Photos: Early in the day, the heat was too much for the fans and a large chunk stayed away. Hide Caption 9 of 9Roger Federer and Simona Halep, both seeded second at the U.S. Open, cruised into the second round at the U.S. Open.