NEW YORK (Reuters) -Fourth seed Alexander Zverev extended his winning streak to 16 matches by easing past South African Lloyd Harris 7-6(6) 6-3 6-4 and into the semi-finals of the U.S. Open on Wednesday where the German looms large as a potential roadblock to Novak Djokovic's bid for a calendar-year Grand Slam.
The victory leaves Zverev one win away from returning to a second consecutive U.S. Open final and another shot at a first career major title after losing to Dominic Thiem last year.
