The North London club take on the Canaries at Carrow Road tomorrow following their 1-1 draw with Aston Villa in the Premier League, but Defoe believes that Chris Hughton's side will be drawing on their winning performance against Arsenal.
"It's another hard game, they had a fantastic result against Arsenal," Defoe told the club's official website.
"I'm sure Chrissie was delighted with that performance and to beat Arsenal, not many teams do that. I can imagine they are buzzing after a win like that. It's another away game for us, another tough game and another must-win game. We're looking forward to it."
Defoe could grab a starting spot in the League Cup clash tomorrow night.