The US Open quarter finals get underway at Flushing Meadows tonight.
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Womens top seed Serena Williams takes on sister, Venus.
The winner of that one will face either Kristina Mladenovic of France, or Italy's Roberta Vinci in the semi finals – they open up proceedings on the Arthur Ashe Court.
Men's top seed Novak Djokovic goes up against Feliciano Lopez tonight.
Andy Murray missed out on a 19th consecutive Grand Slam quarter final, when he was beaten in four sets by Kevin Anderson in the last-16 of the US Open.
Second seed Roger Federer was a straight sets victor over John Isner
