Posted by Sabrina B. @gametimegirl Rafael Nadal rolled his head back, squeezed his eyes shut, covered his contorted face with his left arm and leaned awkwardly in the leather chair used by players during U.S. Open news conferences. Frozen by the leg cramps that simultaneously hit his right hamstring and thigh about two hours after he’d won his third-round match, Nadal stopped taking reporters’ questions and paused between deep breaths to plead in Spanish, “Can you call a trainer for me, please?”