The Juventus striker scored for Portugal, but ended on the losing team as Germany won their Euro 2020 group clash.
"I played with Ronaldo for four seasons and I am not exaggerating when I say that I had the greatest successes with him and thanks to him," Kroos said on the Einfach bad luppen Podcast.
“We were neighbors in the locker room throughout that period and I was glad to see him. We haven't seen each other for a long time, we haven't played Juventus.
“We spoke briefly about the game and the upcoming matches. I wish them the best of luck, I hope they qualify for the next round, just like us. In addition, I asked him how he was doing in Italy, since he has been there for three years.
"After a game you don't have all the time in the world. In the dressing room we exchange shirts. I liked seeing him again."