Australian athlete, 27, won two Olympic gold medals in Paris
Jack served a doping ban after Ligandrol was found in her system
Australian swimmer Shayna Jack has announced she will retire after the Commonwealth Games in Glasgow.
In a video posted on Instagram in which Jack spoke with her coach Dean Boxall, the freestyler fought back tears as she said the Games – from 23 July to 2 August – would be her competitive swan song.
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