Wales have been placed on alert that Argentina will aim to "create as much chaos as possible" in Saturday's Principality Stadium clash.
Just a week after being crushed 32-8 at home by Australia, Wales face the Wallabies' Rugby Championship rivals in an encounter given added significance by their miserable autumn series opener.
Interim head coach Rob Howley reacted to that defeat - Wales' heaviest home loss for 10 years - by making six changes, including dropping 84 times-capped midfield mainstay Jamie Roberts to the bench and recalling his fellow Test Lions Sam Warburton and Alun Wyn Jones.
Wales have beaten Argentina seven times from nine attempts in Cardiff, and a similar result on Saturday under the stadium's closed roof would at least put the autumn campaign back on track ahead of meeting Japan and South Africa later this month.
"It was a very uncharacteristic performance last Saturday," Wales assistant coach and forwards specialist Robin McBryde said.
"There were two things - how good Australia were, and how uncharacteristic we were defensively. It was just one of those first halves. At half-time, we were left scratching our heads, really.
"Argentina are consistent performers in the Rugby Championship. They will be physical, they will be fast.
"Any loose kicks, they are going to look to run it back and try to create as much chaos as possible, which is the type of game they thrive on."
Warburton, meanwhile, paid a glowing tribute to his Blues and Wales colleague Jenkins, who will be 36 next week but shows no obvious sign of slowing up.
"Gethin is in that top category as one of Wales' greatest players," Warburton added.
"Two or three years ago, people would be saying he's slowing down, but I haven't seen him slow down at all in training or in games.
"With Gethin, he is second to none performance-wise. He always puts his body on the line. He empties the tank, and I really respect that."