Murray heading home to think again

The 23-year-old was deeply downcast after losing 6-7 (3/7), 7-6 (7/4), 6-3, 6-3 to Switzerland's Stanislas Wawrinka in a third-round tie he was widely expected to comfortably win.

Murray looked to be on his way after bouncing back from a 2-5 deficit to lift the first set in a tie-breaker.

But after blowing a 5-3 lead in the second set, his game unravelled through a mixture of injury, frustration and Wawrinka's fine play.

"It's frustrating, regardless of whether you're playing well or not, to lose in a Slam. But, that's it. I would have liked to have done better here, but I didn't," the fourth seed said.

"But, you know, it has been a long, long trip for me. Been away a long time. I look forward to getting home, resting, and thinking about what I'm going to need to do to improve.

"This summer overall I played some great tennis again. I'm just disappointed I didn't play my greatest tennis here."

Murray had been billed as being the biggest threat in New York to five-time former winner Roger Federer and top seed Rafael Nadal since he chalked up back-to-back wins over them to lift the Toronto Masters tournament last month.