England coach Andy Robinson insists his world champions must keep France guessing if they are to triumph in Sunday's crucial RBS 6 Nations clash.
Robinson believes England's defeat to Wales last week was at least partly down to being too predictable and feels his players need to spice up their game to get their championship dream back on track.
"This week, it is important that we really go out and play and attack France in an unpredictable way - whereas last week, we were very predictable in everything we tried to do," Robinson said.
With France going for the greater scrummaging prowess of Sale hooker Sebastien Bruno, sacrificing William Servat's superior all-round game, it is clear where last year's Grand Slam champions will look to take charge.
"The major battleground this weekend will be at the scrum," said Robinson.
"This game is going to be about the side who can really physically dominate.
"I think the French, on their day, are an outstanding side. We know that they are one of the most, if not the most, dangerous sides in world rugby.
"They've been written off so many times when they haven't been performing well - and then they suddenly produce a performance of world-class ability. You are always wary of that against a French team.
"(France coach) Bernard Laporte has built in a real force up front; he's built in an excellent tactical kicking game and he's managed to get the self-control, so I think you've got a side there that certainly knows how to win games.
"They didn't play very well (against Scotland) last weekend, by their own admission, but they still came out with a win."
The England coach also praised the way disappointed stars like scrum-half Matt Dawson and teenaged centre Mathew Tait have reacted to being dropped from the side to tackle the French.
"The guys who haven't been selected have done a massive job this week," said Robinson.
"Matt Dawson has been immense with Harry (Ellis); Mathew Tait has been exceptional in his attitude and the way he's worked, and Henry Paul coming back (on the bench) has fitted in well.
"This is about developing a squad of 26, 27, 28 players and being able to pick accordingly for each game. Each game is unique, and sometimes you have got to change the tactics.
"We expected the tactics to work last weekend. They didn't work; I take responsibility for that and I felt it right we needed to make changes.
The pressure is well and truly on, although Robinson has at least been able to retain his sense of humour, after revealing that part of England's preparations on the training pitch this week included a session with the Royal Navy rugby team.
Jokingly asked if he was expecting wet conditions, Robinson replied: "No, I wanted to know how to put the subs on!"