Coco Gauff’s new serve and a U.S. Open win over Ajla Tomljanovic built on old foundations

FLUSHING MEADOWS, N.Y. — The first night of the rest of Coco Gauff’s tennis career looked a lot like a lot of the old ones.
Point-saving sprints, brilliant athleticism, and a three-set win built on grit and competitiveness rather than beautiful tenni… [3422 chars]