Wawrinka won the first set of the Swiss get-together in the quarterfinals with 7-6 (2), but Federer battled back into the match. He won the second set in the tiebreak and then steamed to the win: 7-6 (6) 6-2.
Federer was seven times the best on the hardcourt in Cincinnati. He balanced against Wawrinka on the edge of elimination. At 6-6 in the tiebreak of the second set Wawrinka needed only two points for the win, but at that moment the 37-year old Federer showed his class. The current number 2 of the world brought the score in the mutual encounters with Wawrinka 21-3.
Federer meets in the semi-finals the Belgian David Goffin, who surprised Juan Martin Del Potro from Argentina: 7-6 (5) 7-6 (4). The other finalist comes from the meeting between Novak Djokovic and Marin Cilic.
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