Ben Blair will play no part in the remaining Heineken Cup Pool matches after he suffered a broken hand in a Magners League defeat to the Ospreys on New Years Day.
Cardiff Blues have confirmed Blair has a very small fracture in a bone in his right hand, which has been put in a cast to protect it.
Blair will see a hand specialist on Monday and it is thought that the injury could keep him out of action for up to four weeks.
The New Zealand international fractured the 4th metacarpal bone in the match against the Ospreys on New Year's Eve and his hand is now healing in a splint.
This means the the goal kicking Kiwi will miss the crucial match with Gloucester at the end of the month.
The Blues may have a 100 per cent record in Pool 6, but with Gloucester also performing well, the Kingsholm tussle is likely to be a Pool decider, and the Blues know only too well the cost of coming second in the group stage.
Failure to progress in first place last season meant a trip to Toulouse in the quarter-finals of Europe toughest club competition. The result went the way of the three-times champions and now, Blues boss Dai Young must wait on medical results to see if his goal-kicking full back can help his side into the final eight.
Blair walked off midway through the first half with an ice bag on his hand during his side's 16-12 defeat to their regional neighbours.
Meanwhile, Martyn Williams, the Wales and Lions flanker, was another to leave the field clutching his shoulder, but he is expected to be fit.
"Martyn has struggled throughout the Autumn Test series with a shoulder injury," said Young.
"We rested him for two weeks and he just took another bang on it. There is nothing which needs an operation and nothing to be worried about there."
Rob Howley and Josh Lewsey addressed more than 250 community club coaches and referees at the first WRU National Community Conference on the weekend. The volunteers benefitted from coaching masterclasses and workshops in a bid to connect all levels of the rugby pathway in Wales.
UEFA has today confirmed the Football Association of Wales (FAW) has been successful in its bid for the Millennium Stadium to host the 2017 UEFA Champions League Final on Saturday 3rd June, 2017 (kick-off: 19.45hrs GMT).
The winners of a filmmaking competition organised by the education charity Into Film and the WRU enjoyed a behind the scenes tour of the Millennium Stadium - and a chance to be photographed with the WRU's fire-breathing, rugby loving mascot, Scorch The Dragon, and Welsh international, Jake Ball.
The Wales Under 20 camp are in a quietly confident mood as they face Ireland in the U20 Championship, with Coaching Co-Ordinator Allan Lewis and full back Dafydd Howells targeting a top five finish in the tournament.