Wales back Liam Williams has undergone foot surgery to hand Warren Gatland fresh concern ahead of the Rugby World Cup.
An update from the Wales training camp on Wednesday revealed that Williams had an operation on a foot complaint and would continue his World Cup preparations within the camp.
A valuable member of the side over the last two seasons either on the wing or at full-back, going into the tournament without another major back would be a significant blow for Wales with Jonathan Davies already ruled out.
No timescale has been issued regarding how long it will take to get Williams back fit and firing.
Wales are currently in their second week of training at the WRU's National Centre of Excellent in Vale Resort, before heading to Switzerland for 15 days of altitude training on July 1.
Final 31-man squad submissions for the World Cup must be decided by August 31.