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The Canberra sprinter was forced to endure an agonising wait before being given the green light for London. The 21-year-old missed the 100 metres A-qualifying time by just 0.002 seconds - effectively the width of a five cent coin - in a Japanese meet in May.
After a nervous month, she received a discretionary selection from Athletics Australia selectors to make her Olympic debut. She will become the first Australian woman to compete in the 100m event at an Olympics since Sydney, 2000.
Her selection caps off a stellar year for Breen, who is the reigning 100m and 200m national champion and she also won the women’s Stawell Gift. She represented Australia at the 2010 Commonwealth Games in Delhi, where she made the semi-finals.