Djokovic earns No. 1 seed at U.S. Open; Federer seeded No. 7Author:SI StaffPublish date:Aug 19, 2013 Novak Djokovic, currently ranked No. 1 in the world, earned the top seed for the upcoming U.S. Open.Ronald Martinez/Getty ImagesCopyright 2014 Associated Press. All rights reserved. This material may not be published, broadcast, rewritten, or redistributed.