Still only 17, Gout is already one of the most exciting prospects in global athletics, earning comparisons with Jamaican great Usain Bolt and training with Adidas stable-mate Noah Lyles in Florida.
McLaughlin-Levrone signalled she could well be in the hunt for gold in Tokyo after blasting to victory in 48.90secs, taking the tape ahead of Isabella Whittaker (49.59secs) and Aaliyah Butler in 49.91sec.