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.
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.
