Roger Federer has crashed out of the US Open.
The 19 time Grand Slam Champion was beaten in four sets by Juan Martin del Potro.
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The Argentine will now face Rafael Nadal in the semi-finals.
It is women’s semi-final day in New York and there is and all-American line-up for the first time since 1981.
Two-time champion Venus Williams will play Madison Keys.
That will be followed by the meeting of Sloane Stephens and CoCo Vandeweghe.
