Federer guaranteed place in semifinals by beating Alexander Zverev 7-6 (6), 5-7, 6-1. Sock recorded USA's first victory at event for 10 years by beating Marin Cilic 5-7, 6-2, 7-6 (4).
USA Today: Tennis
Tue, 11/14/2017 - 4:28pm
Federer guaranteed place in semifinals by beating Alexander Zverev 7-6 (6), 5-7, 6-1. Sock recorded USA's first victory at event for 10 years by beating Marin Cilic 5-7, 6-2, 7-6 (4).