Second seed and 2009 champion Roger Federer is out of the French Open after a 6-4 6-3 7-6 (7-4) defeat to Stan Wawrinka in an all-Swiss quarter-final.
Wawrinka, 30, had lost all four of their previous matches at Grand Slam tournaments.
But the number eight seed overcame his 33-year-old Davis Cup team-mate to cause an upset at Roland Garros.
Wawrinka will face Japan’s Kei Nishikori or Frenchman Jo-Wilfried Tsonga in the semi-final.
World number two Federer was second best throughout against an inspired Wawrinka and failed to break serve in a Grand Slam match for the first time since the 2002 US Open.
Federer was broken in the third game of the first set and in the seventh game of the second set.
When a couple of close calls went against him in the third set tie-break, Federer’s hopes of adding to his haul of 17 Grand Slam trophies were over.
A forehand volley on his second match point propelled Wawrinka, the 2014 Australian Open champion, to his first French Open semi-final.

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