Former Brumby Mack Hansen has rejoined the Ireland squad ahead of Sunday's (AEDT) match against the Wallabies.
Hansen has been dealing with a foot injury to start the URC season and dealt with the injury throughout the British & Irish Lions tour, which kept him out of the side for the three-Test series.
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Hansen returned for Connacht against the Bulls in October; however, he reaggravated the injury in the defeat.
The former Australian U20s star will continue to push for his return alongside centre Stuart McCloskey (adductor).
It comes after Jamie Osborne was ruled out of the rest of the Autumn Nations Series after injuring his shoulder in Saturday's 41-10 win against Japan.
The Leinster back, who started at fullback in Dublin and in the previous week's defeat to the All Blacks in Chicago, was forced off in the second half on Saturday.
The 23-year-old, who had been covering for first-choice fullback Hugo Keenan, will miss the match against Australia on November 15 and the clash with Rugby World Cup holders South Africa the following week.
Centre Garry Ringrose and Leinster teammate Josh van der Flier both have minor hamstring strains and will be assessed during the week.
Ireland will look to make it five straight wins over the Australians, with all of those wins coming by five points or less.
