Coco Gauff survives teary moments to battle past Donna Vekic

The American star gave credit to gymnastics great Simone Biles, who was watching from the stands.

Coco Gauff broke down in tears during her post-match interview (Frank Franklin II/AP)

Coco Gauff was in tears during and after her second-round US Open match but found a way through after seeking inspiration from a famous face in the crowd.

The former champion has been struggling with serving problems and is trying to change her action during the tournament with the help of biomechanics expert Gavin MacMillan.