We’re down to four men remaining in that draw at the 2019 French Open. Novak Djokovic put away Alexander Zverev in straight sets, 7-5, 6-2, 6-2, on Thursday to advance to face Dominic Thiem, who dispatched Karen Khachanov with even greater ease, 6-2, 6-4, 6-2. Zverev out-aced Djokovic 10-1 but had eight double faults to Djokovic’s four and converted only 47 service points, to 60 for Djokovic.