BERLIN, June 11 (Xinhua) -- Following are the results on Saturday at the ATP Stuttgart Open (prefix number denotes seeding):
Semifinals
3-Dominic Thiem, Austria, bt 1-Roger Federer, Switzerland, 3-6, 7-6 (9/7), 6-4
7-Philipp Kohlschreiber, Germany, bt Juan Martmn Del Potro, Argentina, 6-3, 6-4
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