(Reuters) - World number ones Serena Williams, aiming to complete the first calendar-year grand slam in 27 years, and Novak Djokovic have been named the top seeds for the U.S. Open championships starting on Monday in New York.
Williams, winner of the last three U.S. women's singles crowns at Flushing Meadows, is followed on the seeding list by number two Simona Halep of Romania, a 2014 French Open finalist.
Russia's Maria Sharapova, the 2006 U.S. Open winner, is seeded third with 2014 U.S. Open finalist Caroline Wozniacki of Denmark seeded fourth.
Five-times U.