Argentina secured their second win of the Rugby Championship with a late 23-19 win over Australia on Saturday.
Wallabies winger Israel Folau bombed a last gasp opportunity to win the game when he ignored a supporting Bernard Foley to cut back inside and knock the ball on.
The error handed Australia their first loss to Argentina since the 2014 Rugby Championship and, after the game, an Australian fan went after flanker Lukhan Tui.
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According to Rugby Australia, the fan could be seen hurling abuse at players as Fox Sports interviewed Reece Hodge post match.
He was then reportedly dragged from the altercation by Wallabies staffers and other players while Tui stood back and watched as the fan was escorted from the ground.
Former Australian captain George Gregan said during the broadcast: "The person doesn’t add to it, it adds to the frustration of the event and for the players. They [Australia] have got to step away from that and they need to improve."
Wallabies head coach Michael Cheika told reporters, after the game, that Tui had reacted so strongly as the fan in question had pushed his sister.
The back-row has asked for time off from rugby for the rest of the season after the bereavement of a close family member earlier this week.
