Murray grinds through cramps to win

Spinning in 70 mph second serves, grabbing at his hamstring during points, Andy Murray gritted his way through head-to-toe cramps to win at the US Open.

Murray outlasted Robin Haase 6-3, 7-6 (6), 1-6, 7-5 in the first round on Monday during an afternoon that was hot but not particularly humid. He was mystified that the cramps came on so early - at the start of the third set after only about an hour and a half on court.

"When it starts to kind of go everywhere, you don't know exactly where it's going to creep up next," he said. "When you stretch one muscle, something else then cramps, too."