Despite the scoreline, Howe insists there were positives to draw from the friendly.
The manager said, "I know everybody will be down on the performance but there was some good stuff in there as well.
"Austria was intense and all these tours are with the way we manage them. The players have been non-stop in work. There has been a little bit of play in there too. I think it probably showed in our performance.
"We travelled here yesterday and looked a little bit jaded. It was great for our preparation, the harder the game the better.
"Celtic you could see were way ahead of us fitness wise and sharpness wise. But I think we will be better for the game."
