Saturday evening at 19:00 in the men’s tennis tournament semifinals at the US Open, Stan Wawrinka will face countryman, Roger Federer. In the quarterfinals, Stan Wawrinka eliminated Kevin Anderson in three sets, while Roger Federer beat Richard Gasquet in three sets on. The two Swiss clashed 21 times so far and the score 18-3 in favor of direct confrontation is Roger Federer. Last but last direct confrontation between the two players was held this year in the tournament in Paris, where he defeated Wawrinka in three sets to Federer.