But Tigers head coach Richard Cockerill moved to reassure Kidney as he hopes to have the full-back available for their Heineken Cup clashes with the Scarlets and Treviso this month.
"Geordan went over on his ankle," said Cockerill. "We are hoping for the best but it's too early to say the extent of his injury."
With Leinster No.15 Rob Kearney on the long-term injury list and set to miss the Six Nations Kidney will be keeping his fingers crossed that Murphy has no ill-effects from the knock on his ankle.
And he wasn't the only Irish star to be in the wars as David Wallace and John Hayes departed early as Munster narrowly beat Glasgow 22-20 ion the Magners League.
But like Cockerill, Munster coach Tony McGahan is optimistic the Irish internationals will play some part in their upcoming European outings.
"David is fine. John got a knee in the back, so we'll see how he goes but they are the only two at this stage," said McGahan.