Stan Wawrinka toughed his was into the Basel quarterfinals beating American qualifier Donald Young 7-6(4), 6-7(3), 6-4. Wawrinka will now face improving qualifier Mischa Zverev.
Juan Martin del Potro avenged an earlier loss in Shanghai to David Goffin, turning the tables with a 7-5, 6-3 win over the Belgian.
“I played well in the big moments. I broke his serve once in each set, and that was enough to win today,” said del Potro
The win puts him into a tasty Friday quarterfinal against Kei Nishikori who he has beaten in all four previous meetings.
“[Kei] is so fast and so aggressive with his backhand. My game has changed since my [wrist] injury but if I serve well, I have a chance to win,” del Potro said.
Another US Open champion advanced as Marin Cilic was a 6-0, 7-6 winner over Pablo Carreno Busta. He’ll face Marcel Granollers who crushed Jack Sock losing just three games.
FRIDAY BASEL SCHEDULE
CENTRE COURT start 1:00 pm
 R. Klaasen (RSA) / R. Ram (USA) vs R. Lindstedt (SWE) / M. Venus (NZL)
Not Before 3:00 pm
G. Muller (LUX) vs F. Delbonis (ARG)
Not Before 5:00 pm
[WC] J. del Potro (ARG) vs  K. Nishikori (JPN)
Not Before 7:00 pm
 S. Wawrinka (SUI) vs [Q] M. Zverev (GER)
 M. Cilic (CRO) vs M. Granollers (ESP)
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