The midfielder said after the game that Germany could not consider themselves among the favourites to take Portugal's continental crown next year, given the lack of experience of some of their players.
However, speaking ahead of Tuesday's final qualifier against Northern Ireland, in which a win will ensure Germany finish top of Group C, Kroos claimed they will have a clearer idea of their ability to challenge after the first international break of next year.
"It's no surprise that we want to win the game. Of course, the chance to finish first in the group is a bit of extra motivation," he told reporters on Monday.
"We've got some good players who have had some minutes. In terms of a grade, I'd put the year between a B and a C, because it's nothing special that we've qualified.
"Several of the younger players have improved already. We've made some progress. The international games in March will be important again as we play against big nations.
"We'll have to wait and see how we perform at the Euros, but I have a good feeling about it."
"Jo can do both: he can make life difficult for our opponents and he's able to make smart decisions with the ball. The fact that we work well together wasn't a surprise to me," he said.