Munster's Tom Ahern will spend the night in hospital, while Ireland captain Peter O'Mahony will be assessed for "a couple of little bangs", following the province's 26-23 defeat to the Northampton Saints at Thomond Park.
Graham Rowntree's side secured their place in the last-16 of the Investec Champions Cup courtesy of their losing bonus-point, but that will come as little consolation to the URC Champions who once again let a promising second half lead slip.
To compound the frustration, this second half collapse came against 14 players, with Northampton hooker Curtis Langdon red-carded late in the first half for a knee to the head of Tom Ahern.
The Munster lock looked quite dazed as he was helped from the pitch, with Rowntree confirming after the game that the in-form forward would spend the night in hospital.
The province will also get O'Mahony checked out after he departed midway through the second half. The Ireland captain looked in some discomfort as he stretched his hip during the third quarter, with Rowntree confirming he had picked up a couple of minor knocks.
The defeat will leave Munster as one of the lowest seeds in the last-16, with Bordeaux, Toulouse, Leinster or maybe even Northampton looking like potential away trips in the next round.
And the Munster coach cut a frustrated figure after seeing his side failed to see out what looked at one stage like being a comfortable win.
"We just lost our way," Rowntree said.
"We spoke at half-time about how it wasn't just going to happen against 14 men. Second half we came out and immediately gave some soft penalties away. And then we were doing things that we had spoken about not doing with the ball, running when we meant to kick and kicking when we meant to run. The game just got away from us a bit, we were playing into the wind, and they grew a leg, didn't they?"
And while the Munster coach gave credit to the Saints for how they stayed in the game, courtesy of the boot of Fin Smith, he admitted his side played a big part in their own downfall.
"Credit to them for managing the conditions and that. No, we will look at how we managed the game, little moments, key penalties that we gave away, that maul was disappointing to concede (the try). We seemed to evacuate at the wrong time and they just broke away and scored and that brought them back in. Hugely frustrating."
"We have got to be better at managing the conditions. That’s been proven over the last few weeks. A week ago we were in the sun, high ball in play and look at the conditions today against 14 men in the second-half and we just lost our way, what we were doing with the ball, we lost our way. I’ve got nothing more technical than that at the moment," he added.
Rowntree said their failure to adapt to the conditions have been their biggest failing this season, and captain Tadhg Beirne admitted that it was a worrying pattern.
"We were trying to come together and talk about being clear and smarter with the ball, but as Wig [Rowntree] said we still have a bit to learn about managing those conditions better," Beirne said.
"It's not just been today, it's been Connacht, Exeter, Leinster on Stephen's Day.
"They're all games where conditions were against us and we just didn't play the conditions well enough. We seriously need to sit down and actually properly learn from those, because we don't want to be sat here saying the same thing again."
