Coco Gauff followed in Serena Williams' footsteps when she became just the second teenager since 2001 to reach the US Open semi-finals.
Iga Swiatek's reign as world number one and US Open champion was brought to an end by a spirited Jelena Ostapenko at Flushing Meadows on Sunday.
The original teenage star Coco Gauff knocked 16-year-old newcomer Mirra Andreeva out of the US Open on Wednesday night.
Coco Gauff battled from a set down under the lights as the US Open served up a thriller on opening night.
Carlos Alcaraz and Iga Swiatek, the current world number ones, will bid to defend their US Open titles they won last year, but a host of rivals will be out to dethrone them.
Coco Gauff claimed her third tournament win of the season with victory over Karolina Muchova in the Southern and Western Open final on Sunday.