Mollie O'Callaghan

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Mollie O'Callaghan

Mollie O'Callaghan set a new Olympic record in the final

Australia's O'Callaghan foils Titmus with new Olympic record for 200m freestyle gold

Peaty and Sjostrom lend star power to World Championships

O'Callaghan trumps Titmus and smashes 14-year-old record for world title