Ireland defence coach Anthony Foley admits that there is huge pressure for them to beat Argentina in Dublin on Saturday.
A loss to the Pumas would mean Ireland will drop down to the third tier of seeds for next month's draw for the 2015 World Cup, which is based on the IRB rankings system.
That means that they will compete in a pool containing two major rivals - something which Ireland are desperate to avoid as it could mean that they wait until 2019 for redemption.
After a loss to South Africa and an easy win over Fiji there is plenty riding on the Argentina match and Foley knows the importance of this weekend's encounter.
"This is probably the biggest game I've been involved in during an autumn series," he told Press Association Sport
"It has ramifications across the board for the next three years so it's very important.
"But it's still 80 minutes of rugby so we need to get our preparation right, make sure the boys get a good night's sleep and not worry too much about it.
"If we have a good mentality on the weekend we should be okay. If you start worrying about results you'll miss what's in front of you.
"Judging by what we've done for the last two weeks, it's pretty spot-on where we are at the moment.
"Preparation is going well, guys are turning up and willing to put their bodies on the line.
"There isn't much being held back in training and there isn't much being held back in preparation.
"We all know what the consequences of the weekend are, but the most important thing is that we make sure we get our processes in place."