After winning the first set against World No. 3 Alexander Zverev, the American had disappeared in the second, losing it in only 28 minutes
Browsing: Jack Sock
The News Agency of Nigeria reports that Sock defeated Filip Krajinovic 5-7, 6-4, 6-1 for the victory in just under two hours
The 14-time Grand Slam champion earned a 6-2 6-3 triumph to set up a semi-final showdown against Fabio Fognini, who defeated Kei Nishikori to reach the final four
Federer will face Wawrinka in the final after the world number three beat Pablo Carreno-Busta in straight sets to win the first semi-final