World number one Novak Djokovic could face Roger Federer in the semifinals of the U.S Open after the pair were grouped in the same side of the draw Thursday . 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 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 .