Serena Williams has qualified for the semi-finals of the U.S Open after beating Karolina Pliskova in straight sets.
This will be Williams 9th straight US Open semi‑final and 14th straight quarter final win.
Meanwhile, Roger Federer is out of the U.S Open after losing his quarter-final match to world number 55 John Millman.
Argentina’s Juan Martin Del Porto has qualified for the semi-finals.
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