Andy Murray, Serena Williams and Stan Wawrinka are the big names in action tonight at the US Open.
Murray will play Japan's Kei Nishikori in the first of today's quarter-finals at Flushing Meadows.
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In the later matches, Williams will play women's fifth seed Simona Halep while Wawrinka is facing an intriguing battle with former champion Juan Martin del Potro.
