South Africa rugby coach Rassie Erasmus is unsure what to expect from England as he prepares to field a relatively inexperienced side in the opening Test of the Springboks’ November internationals at Twickenham.

The match next Saturday falls outside of the international window, which means European clubs are not obliged to release their Bok players, leaving Erasmus with markedly fewer options.

But he sees it as an opportunity to test his less experienced players ahead of next year’s Rugby World Cup in Japan and admits he is unsure how England will perform as they have not played a Test since losing their away series in South Africa 2-1 in June.

“They (England) will have to settle quickly, they haven’t played a Test match since they played us. I know they have been in camp for two weeks but it is difficult to change a lot when you don’t play matches,” Erasmus told reporters on Friday.

“It will be interesting to see if they get it right, what they want to change, and whether they change that much in such a short space of time.”

England’s technical team has been bolstered by the acquisition of New Zealander John Mitchell as defence coach.

He was poached from his position as head coach of Super Rugby side the Bulls and had worked mostly in South Africa since 2010.

His knowledge of the Bok players, added to that of head coach Eddie Jones, will be a factor too according to Erasmus.

“Eddie is clever, Mitch (John Mitchell) is clever … we have got some things we think they are going to throw at us, to be tactically different,” Erasmus said.

“They will defend differently with Mitch and they will know more about us. It’s going to be spicy and interesting and we are going to play with a few young chaps in front of a big crowd, so it’s going to be a big challenge for them.”

Erasmus will announce his tour squad late on Saturday.