Andy Powell has given Wales an injury scare on the eve of their RBS 6 Nations title showdown against Ireland.
The Cardiff Blues number eight pulled out of today's final training session due to a sore thigh muscle and head coach Warren Gatland admitted Powell's injury was "a slight concern."
Powell has started every Six Nations game this season, although he has so far failed to reproduce the blistering form he showed during the autumn Tests, especially on debut against world champions South Africa.
Gatland said: "Andy has got a bit of a sore quad. He didn't do the whole session so we will see how he pulls up from that.
"It is a slight concern. He pulled out of the session because his quad was pretty tight."
If Powell is ruled out, Scarlets forward Dafydd Jones would enter the back-row equation, with Ospreys flanker Jonathan Thomas taking over from Jones among the replacements.