South Africa have a very strong kicking game so England's kick-defence will have to be sharp today.
There will be a lot of pressure on the back three, who should play as if connected by a piece of string.
If the Springboks attack to their right, Mike Brown on the left wing will move forward to become part of the defensive line, albeit slightly behind the rest.
When he moves, the full back and right wing should shift across to fill the gaps.
The full back should cover the left-wing position to guard against kicks down the line, while the right wing moves inside to the No 15 area to cover midfield kicks.
If the attack goes the other way, this shift is reversed.
The back three must ensure England don't get pinned back in their own half as Scotland were by the Boks last weekend.
They have to minimise the amount of grass the Bok fly-half can see before him.
If the ball hits the ground from a kick, it is tricky to counter-attack, especially if the full back or wings are facing the wrong way.
Eyes on the prize: Alex Goode practises his kickingI was impressed by Patrick Lambie's kicks against Scotland to give South Africa territorial dominance so England have to take away his kicking options.
Typically, Springbok No 10s don't have the vision of a Dan Carter, so if England's line-speed is good and they get up in the opposition faces, Lambie is unlikely to open them up with a miracle pass out wide.
Besides the back three, the other crucial figure in the kick-defence is the scrum-half, who plays the 'sweeper' role.
His role is to boss the 'guards' around the rucks and cover chips over the top, so the full back can organise the back three.
You too: Kay believes Mike Brown and the other back two cannot afford to be hemmed inIf you know that a team are going to kick a lot, another player can drop back to form a back four.
It might be the No 8 who will drift into the back field, and it is up to the guys in the line to work harder covering the space in the drift defence.
When I was playing for England, we would have an extra man back when we were up against Argentina, for example, who put up a lot of high kicks.
But the best defences vary what they are doing.
People will regard England as underdogs after their disappointing defeat last week, but they are at home against a Bok side who are in transition and are not playing especially well. England to win 22-16.
More... Rowntree: We're hurt by Australia defeat, but it will inspire us for Springboks visit Chris Foy: Let's get physical! Beefed-up England must fight fire with fire against South Africa
