Ryan Baird is a major doubt for the start of Ireland's Six Nations campaign.
Leinster have confirmed that the versatile forward is facing around three months on the side-lines due to a broken leg.
Baird suffered a suspected tibia fracture in Ireland's 24-13 loss to South Africa on Saturday.
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Jamie Osborne will also be out for around four months with his shoulder injury but lock Joe McCarthy is going through the final stages of his recovery from a foot issue.
Connacht's Mack Hansen suffered a re-occurrence of his foot injury in the game against the Springboks.
