Top seed Stan Wawrinka and in-form Juan Martin del Potro move into Swiss Indoors quarter-finals in Basle

Del Potro beat fifth-seeded David Goffin of Belgium 7-5, 6-3, while US Open champion Wawrinka had 16 aces as he beat American player Donald Young 7-6 (4), 6-7 (3), 6-4 in Basle..