England assistant coach John Mitchell has billed Saturday's World Cup final between his side and South Africa as a collision of the sport's two most powerful teams.

Eddie Jones's men stormed into the International Stadium Yokohama showpiece by steamrolling reigning champions New Zealand 19-7 and now occupy first place in the global rankings.

South Africa edged past Wales with a dominant performance from their giant pack, who have bulldozed a path through Japan with muscular inside centre Damian de Allende remaining a constant threat.

"But we also feel we are very adaptable too – we don't just play one way so that's one of strengths."

New Zealand were overwhelmed in possibly the greatest performance in English rugby history but Mitchell insists there is another level to be reached.

"We are really excited by the week. In reality, all we have done is present ourselves with another opportunity at the right end of the tournament," Mitchell said.

"We want to get better and we feel we can get better as well. Everyone is really calm and eager to get onto their work. We just got to go and earn it now."