Bendtner injured in car crash
The 21-year-old lost control of his 100,000-pound Aston Martin close to Arsenal's training ground but escaped serious injury.
"He didn't train today and he is bruised and shaken. He is not playing tomorrow," manager Arsene Wenger told reporters on Monday.
Arsenal will also be without midfielder Denilson for Tuesday's match with the Brazilian expected to be sidelined for two months with a back injury.
"He has a fracture in his back. He won't play for at least two months," Wenger said.
Arsenal opened their Champions League campaign with a 3-2 victory against Standard Liege.