Mollie O'Callaghan has failed to place in the women's 100m freestyle final in Paris.
Fresh from beating teammate Ariarne Titmus in the women's 200m freestyle final on Monday, O'Callaghan, 20, was unable to back up her strong performances as she finished fourth on Wednesday night.
Swedish great Sarah Sjoestroem trumped the field, winning in 52.16 seconds, with American Torrie Huske (52.29) claiming silver and Hong Kong's Siobhan Bernadette Haughey taking the bronze.
O'Callaghan, who was seeking to become the third woman to complete a 100-200m freestyle golden double at the same Olympics, was next-best in 52.34.
Jack touched in 52.72 as the Australians failed to make ground on the last lap after turning in their finishing positions.
More to follow.
Mollie O'Callaghan failed to win a medal in the women's 100m freestyle final
O'Callaghan and Shayna Jack finished fourth and fifth respectively on Thursday morning