Wales fly-half Sam Costelow has been ruled out of Friday's Six Nations match against Ireland at the Aviva Stadium.
Costelow has not recovered from an ankle injury he sustained in the recent defeat to Scotland but could return in time for his country's final match of the tournament against Italy.
Costelow's absence could mean a swift return to the starting line-up for Dan Edwards, who was dropped against Scotland after playing in the previous seven matches.
Jarrod Evans is also an option and Wales' attack coach Matt Sherratt praised the level of competition between his side's current group of number 10s.
Sherratt told a press conference: "There's a real tussle going on with the 10s at the moment.
"Dan (Edwards) was starting in the autumn and started the Six Nations. Sam has trained the house down and deserved that start.
"It's up to the two remaining for this week now to fight it out to start at the weekend."
Watch Ireland v Wales in the Six Nations on Friday from 7pm on RTÉ2 and RTÉ Player. Follow a live blog on the RTÉ News App and on rte.ie/sport. Listen to commentary on an extended Inside Sport on RTÉ Radio 1
