Munster's Darren Sweetnam is being assessed by the club's medical team for a back injury he picked up while in action for Ireland in their November International against USA over the weekend.
Sweetnam was substituted in the first half of Ireland's 57-14 victory on Saturday and replaced by Ross Byrne. Ireland head coach Joe Schmidt revealed after the game that he had picked up an injury, saying: "His back tightened. He was struggling to run. Hopefully it's nothing serious."
There had been suggestions his withdrawal was tactical but Munster have confirmed that he's being assessed for a back problem.
It is not yet known whether he will be fit for selection ahead of their Guinness Pro14 clash with Edinburgh on Friday night.
Munster also report that Ronan O’Mahony, Conor Murray, Chris Farrell and Conor Oliver all came through their first appearances of the season with no ill effects as the province scored a bonus-point victory over Zebre on Sunday.
Murray came on in the 50th minute of the tie, having previously been sidelined with a neck injury during Ireland's summer tour to Australia.
The squad returned from that game in Italy earlier today and will return to training tomorrow as they face a short turnaround for the arrival of Edinburgh.