Maddison scored in the Carabao Cup defeat at Liverpool in midweek.
Rodgers said, “He is a real threat and to score at the Kop end a goal of that quality he will always remember that, a great strike.
“He is starting to get back to the levels and producing, which is what he has to do: create goals, score goals, work hard, and he is doing all of that."
On meeting Manchester City on Boxing Day, the manager added: “They have top players, not too many injuries. They can rotate and change and they are playing their game, a high-level positioning game. They are virtually press-resistant, they can play through pressure and when you sit deep they have players of real intelligence to find spaces.
“You have to play with courage, and when you have the ball you have to exploit the spaces."
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