Coco Gauff's 1st match with a new serve coach at the U.S. Open is a struggle but also a win

NEW YORK — Coco Gauff’s first match since enlisting someone to help with her shaky serving got off to a rocky start at the U.S. Open on Tuesday night. She double-faulted in the very first game — and a total of 10 times. She got broken in that game, too — and a total of six times. The only numbers that truly counted in the end, of course, were the ones on the Arthur Ashe Stadium scoreboard, and those showed that the No. 3-seeded Gauff held on for a 6-4, 6-7 (2), 7-5 victory over