Juan Martin del Potro came up against tour veteran Ferrer, Feliciano Lopez battled past Jack Sock as Philipp Kohlschreiber and Pierre-Hugues Herbert made surprise gains into the fourth round. Watch official ATP tennis streams all year round: http://tnn.is/YouTube Tennis TV is the OFFICIAL live streaming service of the ATP World Tour. Subscribe to our YouTube channel here: https://www.youtube.com/tennistv?sub_confirmation=1 Live streaming on PC, Mac, Apple TV, Roku, Amazon Fire TV, Xbox One and Chromecast plus mobile & tablet apps on iOS & Android.