Roberts arrived on loan from Manchester City, but is yet to make his debut for the Canaries.
Now he will get his opportunity in their Carabao Cup tie against Crawley.
Farke said about Roberts to reporters: "We brought him on a lot in pre-season. I think it was necessary that he played many minutes because he didn't play that much in the season before.
"In many periods in pre-season he looked pretty impressive. I think there's a good chance tomorrow that he'll be involved."