World number one Rafael Nadal [ Images ] was installed as the top men's seed for the US Open [ Images ] on Monday as the Spaniard bids to complete a career grand slam.

While Nadal chases his first US Open crown, Swiss Roger Federer [ Images ], a finalist at Flushing Meadows the last six years lifting the title five times, is seeded second.

Serb Novak Djokovic [ Images ] is seeded third and Briton Andy Murray [ Images ], the 2008 US Open runner-up, fourth.

Title holder Juan Martin del Potro of Argentina pulled out of the tournament. He is still recovering from surgery on a right wrist injury that has put him out for almost the whole season.

Andy Roddick [ Images ] is the top American, the 2003 US Open winner seeded ninth.

The USTA will announce the women's seeds on Tuesday due to the Monday finish of the rain-delayed Montreal Cup won by world number two Caroline Wozniacki [ Images ].

The Dane is expected to be the top women's seed after American world number one Serena Williams [ Images ] was ruled out with an injury.

The US Open starts on August 30.