Clashes between England and Wales need hype like a raging fire needs an extra can of petrol.
The contest itself is enough to fill a stadium twice the size of Twickenham without the build up these games always get but let’s not let that stop us adding a little more sizzle to the steak.
With the tournament perfectly poised with four sides on four points apiece, the winner of this match will be the only realistic contender to Ireland for the title going into the last round.
It will also edge either side one game ahead in this fixture. The stats currently stand at 56 wins each and 12 draws.
Let’s also not forget this will be the last time they meet before Wales return to Twickenham in their pool match in the 2015 Rugby World Cup.
And then there is the "R" word. If England needed any extra motivation, they will find it in the thumping they took last season as Wales swept to the championship under the roof in Cardiff.
With microphones and dictaphones under their noses, players and coaches will deny revenge is on their minds until the cows are back in the shed.
But in the privacy of the dressing room a few minutes before kick-off, the captaincy handbook decrees that Chris Robshaw will certainly be using it then to give the fires one last stoke before leading his men out.
Here are the key battles.