London - England coach Eddie Jones says his side needs depth to topple to the Springboks for the first time since 2006.
Jones, who announced his squad for the November Tests on Wednesday, says he has focussed on depth in key positions and that they know victory won't come without lots of practice.
"Well there's nothing to change. We want to train with intensity and injuries are part of rugby," he explained.
"No one likes to see players get injured but we're playing South Africa so we need to train with intensity to beat them. We haven't beaten them since 2006.
"History shows that when you're preparing for a World Cup you need depth down to four and five in all positions.
"Stephen Donald was out whitebaiting and then kicked the winning goal in a World Cup final for New Zealand wearing a jersey that was too small. That's the sort of depth you need.
"You never like to see players get injured but it presents opportunities for other guys to come forward."
England head to Portugal for a week-long training camp on Sunday before facing South Africa at Twickenham on November 12, with Fiji, Argentina and Australia arriving at 'headquarters' on successive weekends.
England 33-man squad:
Brown (Harlequins), Danny Care (Harlequins), Elliot Daly (Wasps), Owen
Farrell (Saracens), George Ford (Bath),Alex Goode (Saracens), Mike Haley
(Sale), Jonathan Joseph (Bath), Alex Lozowski (Saracens), Jonny May
(Gloucester), Semesa Rokoduguni (Bath), Henry Slade (Exeter), Ben Te’o
(Worcester), Marland Yarde (Harlequins), Ben Youngs (Leicester)
Attwood (Bath), Dan Cole (Leicester), Charlie Ewels (Bath), Ellis Genge
(Leicester), Jamie George (Saracens), Teimana Harrison (Northampton),
Dylan Hartley (Northampton), Nathan Hughes (Wasps), Joe Launchbury
(Wasps),Courtney Lawes (Northampton), Joe Marler (Harlequins), Ben
Morgan (Gloucester), Chris Robshaw (Harlequins), Kyle Sinckler
(Harlequins), Tommy Taylor (Wasps), Billy Vunipola (Saracens), Mako
Vunipola (Saracens), Tom Wood (Northampton)
Injured players not considered for selection
Clifford, Luke Cowan-Dickie, James Haskell, Maro Itoje, Sam Jones,
George Kruis, Jack Nowell, Manu Tuilagi, Anthony Watson, Mike Williams