Coco Gauff will open singles play Aug. 26 at the US Open against Ajla Tomljanovic and with new coach Gavin MacMillan at Arthur Ashe Stadium.

Delray Beach, Florida native Coco Gauff plays for her second US Open tennis championship. See the women's draw, TV schedule, US Open bracket.

Against Valentova, an 18-year-old who won the junior title at the French Open last year and was competing in the main draw at a major tournament for the first time, Gauff got broken five times.

Coco Gauff returns to Arthur Ashe Stadium to open her US Open title defense, facing Australian veteran Ajla Tomljanovi in a ...