Tough battle': Roger Federer and Stan Wawrinka resume rivalry at Indian Wells
Australian Open: In a Swiss Mix Up, Stanislas Wawrinka Will Beat Roger Federer | News, Scores, Highlights, Stats, and Rumors | Bleacher Report
French Open 2019: Roger Federer Ousts Good Friend Stan Wawrinka, Sets Up Dream Rafael Nadal Semi-Final
We will see a great Stan": Federer, Wawrinka talk third-round meeting
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Roger Federer to take on Stan Wawrinka in US Open semi-finals | Tennis News | Sky Sports