England head coach Eddie Jones believes Argentina will be feeling the heat to deliver ahead of their two-Test series.
The Six Nations champions' preparations are well underway for Saturday's first Test between the two nations, and Jones highlights los Pumas record last year as an issue.
"Argentina are under a lot of pressure to win this game," Jones told Press Association Sport.
"They didn't have a great 2016 and they know they are playing an under-strength England side, so all the pressure is on Argentina. And, when you are under pressure, you can do one of two things. You can become even more adventurous or you can revert back to type.
"Everyone eats steaks here, everyone wants to bullfight, everyone wants to scrum, so it is a matter of where they go and we are not sure.
"Our preparation has got to be so that we are prepared for either of those. They might start to run the ball from anywhere so we don't know."
Jones was also pleased that referee Nigel Owens had been appointed for the fixture in San Juan, particularly when it came to the scrum.
"We have got a very good referee in Nigel Owens, probably the best referee in the game," Jones added.
"Super Rugby sides tend to scrum quite passively, but I am sure the Pumas on Saturday won't be scrummaging passively.
"It will be a whole different ball game. We are going to go with a reasonably young front row, which means they have got no fear, which is fantastic for us."