"You can pile on the disappointment however you want to," Manning told reporters. "I'm disappointed that we lost the game and everything that comes with that."
Asked how difficult it will be to get beyond the loss and get ready for Sunday's game at Kansas City, Manning said that's part of the job.
"I think that's the test of football teams," he said. "I think it would be wrong if guys weren't disappointed and bothered by this loss. So I think you're allowed a night and maybe half the day tomorrow to still be ticked off about it and disappointed.
"That's part of being a professional: [You] learn from it, study the film, learn from the coaches. We did some good things -- obviously the running game was great. We had some mistakes, and when you make those mistakes, it's hard to beat good teams on the road."