"Maro has got the work rate and he's very physical. There's not much he doesn't have to be honest. If he wanted to play fly-half he probably could," Kruis told reporters.
"He's a very talented player and if it benefits the team to have him there, then that's the right position for him. At Saracens he's played six a few times. Eddie obviously has a plan of what he wants and if it's right for the team, that will be the case."
England will also take on Fiji, Argentina and Australia at Twickenham in November and December.