Manager Roy Hodgson says it is time for England to show their "ruthless" side when they face Iceland in a Euro 2016 last-16 clash in Nice on Monday night.
Hodgson's men have endured a somewhat frustrating tournament so far, a thrilling win over Wales sandwiched by draws against Russia and Slovakia.
England had the better of both draws but only found the net once (in the 1-1 result with Russia), allowing Wales to top the group.
Hodgson knows England could be facing a shock exit from the tournament if they do not produce a more clinical display against Iceland.
Speaking on the eve of the match, Hodgson said: "We need to be as ruthless as we can possibly be because we know there are no prizes, unfortunately, for playing what some people might think is good football.
"It's all about winning or losing and staying in or going out, and we have been very brutal with ourselves in that respect and we have a very brutal focus.
"We made it very clear amongst ourselves that it doesn't matter that we, in our eyes, are playing well.
"All that matters is that we haven't won, and when you don't win you get criticised and perhaps rightly so because there's always a reason why you haven't won.
"I've been very keen to point out to the players - although I've not encountered any opposition - that we've got to make certain that we turn what we think is domination in some games, or imposing our game onto opponents, into wins.
"If we don't, then it's not going to be good enough, and we're going to be disappointed because we think we have quite a good team and we think we play good football.
"This is the ultimate test because if we don't win, that's the end for us.
"All our focus is on getting through that game and then we will see where it takes us because if we do get through the game then who knows? Maybe it will give us a bit of a boost."
Like England, Iceland won one and drew two of their group stage matches and Hodgson is full of praise for the work of his old friend Lars Lagerback, who co-manages the team.
Lagerback is unbeaten in six previous encounters with England and Iceland have reached new heights since he took charge five years ago.
"There is no doubt about what he has done," said Hodgson.
"I think he brings a calm to teams. He certainly brings organisation.
"I've seen Iceland in their three games - they are so compact, they work so hard for each other, and they are prepared to make the ultimate sacrifices.
"And then of course he uses what weapons he finds at his disposal. He finds himself with a guy called Aron Gunnarsson, who throws the ball in a bit like Rory Delap, so they work hard on that aspect of the game.
"That's all you can do. He doesn't have the wealth of talent at his disposal that I believe I have as England manager.
"But, as you heard Wayne Rooney say, only 11 play and, if you happen to get a good 11, you can cause some so-called more talented individuals a lot of problems.
"It won't be an easy game."