Andy Murray will start a grand slam tournament at the bottom of the draw for the first time after being seeded second for next week's US Open.
The 22-year-old climbed above Rafael Nadal to be number two in the world last week after winning the Masters 1000 event in Montreal.
Reigning champion Roger Federer, who is bidding for his third successive major title after triumphing at the French Open and Wimbledon, is the top seed and therefore cannot face Murray until the final.
After recovering from the knee problems that prevented him defending his Wimbledon crown, Nadal is seeded third ahead of Novak Djokovic and SW19 runner-up Andy Roddick.
In the women's event, world number one Dinara Safina again tops the list and will hope to break her grand slam duck.
Defending champion Serena Williams, who currently holds three of the slams, is second with sister Venus seeded third. Former champion Maria Sharapova makes the top 32 at number 29.
The singles draws for the tournament, which begins next Monday, take place at midday tomorrow in New York (5pm).