Coco is the first American teenager to win a GS title this century. Prior, the most recent American teenager to win a major was Serena Williams, who won the USO, age 17 in 1999.
Coco becomes only the fourth American teenager to win a GS singles title in the Open Era ( since 1968) joining Chris Evert, Tracy Austin and Serena Williams.
With Coco's first GS title, Coco stands at 16-0 in the US since the summer began, her only loss was to Jess Pegula in the QFs in Montreal.
Coco will be the world No 3 on Monday updated singles ranking and she and her doubles partner Jess Pegula will be co-world No 1 in Mondays new doubles rankings.