Andy Murray has been seeded third at next week's US Open as he bids to regain the title he won in 2012.
World number one Novak Djokovic tops the men's seeds, ahead of five-time winner Roger Federer.
Marin Cilic, the 2014 winner, is seeded ninth for the tournament at Flushing Meadows, which starts on 31 August.
Defending champion Serena Williams heads the women's entry, with Romania's Simona Halep seeded second, and 2006 winner Maria Sharapova third.
Britain's Brydan Klein, 25, is two wins from a place in the main draw after a 4-6 6-1 6-2 victory over Serbia's Dusan Lajovic in the first round of qualifying.
However, there was disappointment for Liam Broady as he was beaten 4-6 6-4 7-5 by Spaniard Inigo Cervantes.
British number one Murray, 28, beat Djokovic for the first time since the 2013 Wimbledon final to win the Montreal Masters this month and rise to number two in the world - before he was overtaken again by 34-year-old Federer when the Swiss won the Cincinnati Masters.
Victory for Williams, 33, who has won the title for the past three years, will complete the first calendar-year grand slam in 27 years following success at the Australian Open, French Open and Wimbledon.