World No.1 Novak Djokovic to begin U.S. Open challenge against a qualifier . Defending champion Rafael Nadal drawn to face Andrey Martin of Russia . Caroline Wozniacki in quest for a grand slam against Nuria Llagostera Vives . Two - time winner Serena Williams to face Serb Bojana Jovanovski .
World No.1 Novak Djokovic to begin U.S. Open challenge against a qualifier . Defending champion Rafael Nadal drawn to play Andrey Golubev of Kazakhstan . Caroline Wozniacki begins quest for maiden grand slam against Nuria Llagostera Vives . Three-time winner Serena Williams to face Serb Bojana Jovanovski .