Wales utility back James Hook looks set to make his first start for his country in more than two years in Saturday's clash with Argentina in Cardiff.
The Six Nations champions will regroup on Monday after adding four reinforcements as training cover ahead of the encounter with los Pumas.
Wales boss Warren Gatland has called up Scarlets props Samson Lee and Rhodri Jones, together with Dragons backs Tom Prydie and Hallam Amos.
It follows a bruising clash with South Africa which saw four players - centre Jonathan Davies, prop Adam Jones, wing Liam Williams and substitute prop Scott Andrews - suffer first-half injuries.
Scarlets stalwart Davies suffered a damaged pectoral muscle that forced him off inside 15 minutes of the clash at the Millennium Stadium.
Gatland has already confirmed the British and Irish Lion will miss Wales' remaining end-f-year matches against Argentina, Tonga and Australia, but if he requires surgery then Davies could also miss the upcoming Six Nations.
Jones, meanwhile, left the ground on crutches due to a calf muscle problem, while Williams took blow to the head, but Andrews appears to be fine following initial reports of a neck problem.
Hook went on as an early replacement for Williams, taking up the full-back position with Leigh Halfpenny moving to the wing, and he could now retain the number 15 shirt against Argentina.
"It all seemed to happen at once, with myself and Ashley (Beck) going on," explained Hook.
"Jon Davies was playing so well up to that point, making two clean breaks, but we had to get back into the swing of things pretty quickly.
"I don't think I have played in a game before when four players have gone off injured by half-time.
"It was strange, and real bad luck. It was one of those things you cannot do anything about. They were key players as well - Adam Jones, Jonathan Davies, boys like that. It was just unlucky.
"It was a case of coming together and trying our best. At the end of the first half we threw the kitchen sink at them, and in fairness to them, they defended well.
"We were positive going into the game. We know how good a team the Springboks are, but we genuinely felt we could go out there and beat them.
"Sam (Warburton) said in the changing room it was a bounce of the ball here or there, and if we played them again next week we would still fancy our chances.
"There are a few black eyes about and a lot of sore bodies, but we will come back in on Monday and see how everyone is."