Martin Johnson has warned his England side they must seize the initiative in the opening exchanges of tonight's clash with Argentina in Salta.
England will complete a 2-0 series victory and secure their fourth successive Test victory if they topple the Pumas at the Estadio Padre Ernesto Martearena.
Emphatic 37-15 winners in the opening Test at Old Trafford, Johnson fears the consequences if Argentina are allowed to secure an early foothold in front of their noisy fans.
"Argentina are a team you want to get ahead of - you don't want to be chasing the game because of the way they control the ball and their kicking game," he said.
"We've got to impose ourselves on them, get away from our 22 and put the pressure on them rather than inviting the pressure back on ourselves.
"I think it will be very tight. It will come down to kicking goals - that will be very important.
"There were opportunities last week when we could have kept the ball in hand more and then there were times when we did, but we didn't execute well.
"If we can improve on that then hopefully it will give us the chance to score tries when we're down in their end.
"But we have to get down there - you're not going to score tries from 80 yards out very often in Test rugby."
Argentina have been strengthened by the return of hooker Mario Ledesma, lock Rimas Alvarez Kairelis and prop Marcos Ayerza and are hurting after their thrashing in Manchester.
"Ledesma is obviously their first-choice hooker, Ayerza on the tighthead - although he's normally a loosehead - is also a very good player," said Johnson.
"And with Alvarez back in the second row too they should be stronger. Being away from home for us makes it more difficult."
England will be replaced by Argentina in fifth place in the International Rugby Board world rankings should they lose.