England will be without Gloucester Rugby star Willi Heinz after the scrum-half sustained a hamstring injury in the semi-final win over New Zealand.
The 32-year-old has appeared five times for Eddies Jones’s side in the tournament and will be replaced by Saracens’ Ben Spencer.
England booked their place in the final courtesy of a 19-7 win over New Zealand on Saturday morning.
They’ll face South Africa in the final after the Springboks saw off Wales 19-16 in the other semi-final.
“Ben has been in and around the squad for the last couple of years and knows the game and knows the players and is a fit guy and fits in quickly Jones said.
“We said to the guys outside the 31 that they need to be ready to go.
Spencer joins Ben Youngs in the squad as the only other recognized scrum-half and could earn minutes as England look to win their second Rugby World Cup.
Jones knows that it will be a great learning curve for the Saracens scrum-half who has earned three England caps to date.
Check out the Park Life Sport Rugby preview ahead of Saturday’s final below.
“It is a great opportunity ahead of him and he has to learn a few new things and Willi and Ben (Youngs) will help him with that.
“The task in hand is no different from any other player and he has to learn a bit more and get himself physically and mentally ready.