Ronaldo was hooked with 20 minutes to go during the 2-2 draw.
"I see it as being perfectly normal, it's one of those where more is made of it than it really was," argued Kroos.
"It's normal that these things happen and I'm used to it. It's virtually impossible for a player to put in 60 good performances over the course of a season. The coach is the one who decides who plays the full game and who comes off early. Cristiano is back in with the team as always and he's ready."