
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.

Federer, who has never lost in the first round in New York, won 84% of his first-serve points.

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.

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.

But French Open finalist Lucie Safarova made a quick exit, falling to the dangerous Lesia Tsurenko in two sets.

Tsurenko of Ukraine has climbed the rankings recently and won her first title in Turkey in July.

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.

Donald Young stunned No. 11 seed Gilles Simon, rallying from two sets and a break down.

Early in the day, the heat was too much for the fans and a large chunk stayed away.