Paul O'Connell accepts it is time for Ireland to deliver after highlighting the significance of Saturday's World Cup send-off against England.
The Irish, who are missing Brian O'Driscoll and Sean O'Brien to injury, are in desperate need of victory after collapsing to three successive defeats in their warm-up Tests.
"If I say it's a must-win game and we don't win, what happens?" said the Lions captain. "When you lose games, no matter who you play for, you rebuild afterwards. It's an important game, there's no doubt about that. We really want to come out of the right side of the result."
He added: "We have an excellent side, the best I'll have gone to a World Cup with. We just need to produce what we're capable of.
"We wished we'd done slightly better than we have done in the first three weeks, but that's the way it goes.
"The last three weeks have been a mix and match of players and our performances have been disappointing.
"Hopefully we can now get back on track with a big performance against England.
"If we produce a good performance against England, it will stand us in good stead for the World Cup."