Cardiff Blues scrum-half Lloyd Williams has undergone surgery on the ankle injury that ended his Wales tour to New Zealand.
Williams, prop Gethin Jenkins (calf) and flanker Josh Turnbull (shoulder) returned home early from the tour.
But Williams is Blues' biggest concern as they prepare for the 2016-17 season.
"The scrum-half has now undergone successful surgery to repair the damage and will begin a rehabilitation process," read a Blues statement.
Williams failed to make it on to the pitch on Wales' tour, having won the last of his 27 caps off the bench in their 27-13 defeat by England on 29 May.