Latest on US Open: Nadal deals with dehydration, bad stomach The Latest on the U.S. Open (all times local): 12:48 a.m. On a muggy night, Rafael Nadal said he felt dehydrated, and that's why his level of play dropped for about a set. "I had some problems. I was sweating a lot," Nadal said after beating 18-year-old Borna Coric in four sets in the U.S. Open's first round. Nadal said he "had a little bit of (a) stomach problem" and wasn't "physically...