Ireland have suffered another injury blow, with Sean Jansen ruled out for the remainder of the Nations Championship after being forced off against Argentina.

The Connacht forward was unable to continue during Friday's 42-12 victory in Dublin and will return to his province to continue his rehabilitation.

Jansen's absence adds to Ireland's growing back-row concerns, with Caelan Doris and Jack Conan already sidelined.

Doris is also expected to miss the remainder of 2026 after suffering a fresh setback following surgery on his foot and knee.

The Leinster captain sustained a foot injury during their URC final victory over the Bulls in June before undergoing operations on both issues. However, an infection in his knee delayed his recovery.

Ireland have since confirmed that Doris has suffered another knee injury, ruling him out for the rest of the autumn campaign.

Andy Farrell's side still have Fiji and South Africa to face before the Nations Championship finals weekend at Allianz Stadium.

Ireland will be aiming to finish as the highest-ranked northern hemisphere side, potentially earning a meeting with the leading southern hemisphere team for the chance to lift the inaugural Nations Championship trophy.

Hooker Dan Sheehan will miss Saturday's home fixture against Fiji after suffering a concussion against Argentina.

However, Ireland are "hopeful" that wing Rob Baloucoune, who experienced cramp, and flanker Josh van der Flier, who has an ankle problem, will be available.

With their back-row options increasingly stretched, uncapped Ulster forward David McCann has been called into the squad.

Gus McCarthy has also joined to provide additional cover at hooker.

Centre Bundee Aki, who was a late withdrawal from the Argentina match due to illness, is expected to return to full training on Tuesday.

Ireland opened their autumn campaign with a convincing victory over Argentina at the Aviva Stadium, putting pressure on France and England at the top of the northern hemisphere standings.

Farrell also revealed that Mack Hansen picked up an ankle problem against Argentina.

However, the winger was not included in Monday's squad update from the Irish Rugby Football Union (IRFU).