Isaac Boss didn't look to steady on his feet as he left the field of play following a dreadful tip tackle by Dragons sub Tetaz Chapparo.
The Leinster scrumhalf, a sub himself for the returning Eoin Reddan, was plunged head first towards the turf after Chapparo had lifted him in the air in the dying minutes of last night's match at the RDS. Blues coach Matt O'Connor didn't look too concerned when asked about Boss after his side's win.
"He's all right. The physios were a little bit concerned about his neck but I think it's fine."
Reddan's calf muscle looks to have fully healed after he came through 48 minutes of provincial action unscathed and under the watchful eye of Joe Schmidt. The Ireland head coach will be hoping to have a couple of extra selection headaches ahead of the Six Nations trip to Twickenham after watching all the provinces bar Ulster in Rabo Direct PRO 12 action. Scarlets visit to Ravenhill fell victim to the weather.
Luke Fitzgerald looks almost certain not to be in London next Saturday despite seeming on the verge of starting at the RDS last night after a full week's training with the province.
The medical team voiced their concern to O'Connor after seeing the winger look a bit off the pace at Wednesday's training session.
"They just thought he'd be better off to have another week. It's a day by day thing. A bloke who changes direction and puts the load through himself that he does, he needs to be right. There's a lot of big games to go, we're not going to risk him for a game against the Dragons on a pretty sticky track."
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