Australia's Rugby Championship defeat to Argentina was marred by unsavoury scenes with video footage emerging of a fan in an altercation with Lukhan Tui.
The Wallabies lost 23-19 in Saturday's contest on the Gold Coast to suffer a home defeat to the Pumas for the first time in 35 years.
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It means Michael Cheika's side have now won just once in three Rugby Championship fixtures this season and frustrations boiled over at full-time - a fan exchanging verbals with Tui before appearing to grapple with the flanker.
The fan was shown being wrested away by a fellow spectator, as players tried to assuage the situation.
