Ryan Baird has been ruled out of Ireland's next Autumn Nations Series match against Fiji.
The lock came on as a replacement in the win against Argentina last Friday, but was brought off shortly after with a head injury.
But there's good news for the squad, with Tadhg Furlong and Tom O'Toole both set to return this weekend.
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The British and Irish Lions are set to face a team made up of players with indigenous Australian and Pacific Islands heritage during next summer's tour.
The tourists were due to play the Melbourne Rebels as part of the 2025 tour, before the Super Rugby franchise went into administration.
Players such as Kurtley Beale and Marika Korobeite could be selected as part of the side.