Eddie Jones believes South Africa will match England's power in the scrum in Saturday's World Cup final in Paris.
South Africa and England go head-to-head again on Saturday
England's forwards dominated Australia and France, while Boks' technical advisor Jones admits South Africa struggled at times against Argentina.
But Jones told BBC 5live: "There have been times when we haven't done so well in the scrum but I'm sure our tight five will stand up to the challenge.
"A few technical issues need to be sorted out and I'm sure they will be."
Jones has experienced what it is like to lose to England in the World Cup final, having been Australia's coach in 2003 when Jonny Wilkinson kicked an extra-time drop goal to secure victory.
And he knows how dangerous Wilkinson remains - the fly half has revitalised England since their 36-0 defeat by South Africa in the group stage, a match he missed through injury.
Jones said: "Since we beat England they have really progressed their game, become cohesive and they have a good understanding of where their strengths and weaknesses lay.
Our back line is very mobile and will be a challenge for England
Boks technical advisor Eddie Jones
"It's all credit to Brian Ashton and his staff that they have come back so well.
"And Wilkinson is a guy who gives the players around him a lot of confidence. He is also outstanding defensively - but I think we can put a bit of pressure on him."
Jones feels a key area will be in the breakdown and expects South Africa to continue to impress here.
"Set-pieces and defence have been very important in this World Cup, but one thing that hasn't been mentioned too much is turnover ball," he said.
"One of the reasons South Africa has done well is that we've been able to convert those opportunities into tries.
"You can play the game as tight as possible but at some stage you will have to move the ball around.
"England have started giving the ball more air they have previously. That can expose you and our back line is very mobile and will be a challenge for England."
Argentina found to their cost in the semi-final just how ruthless South Africa can be - particularly through wing Bryan Habana, who touched down twice when left in space.
And Jones warned: "Habana has got the ability to turn a match, and at his best he is probably one of the best match-winners in the game."