US Open: Djokovic enters Men's Singles' semi-final

In US Open, Novak Djokovic entered Men's Singles' semi-final defeating John Millman of Australia on Thursday.  Nadal beat Millman in straight sets 6-3, 6-4, 6-4. The Serbian will now face Kei Nishikori of Japan in the semi-final on Saturday.  Nishikori entered the last four of the tournament defeating seventh seed Croatian Marin Cilic in a five-set match 2-6, 6-4, 7-6, 4-6, 6-4.  In Women's Singles, Madison Keys of US has entered the semifinals defeating Carla Suarez N...