This is the tweet in which he addressed the Russian people. In his speech published with Russian subtitles, he also gives interesting information about his private life, such as the incident that helped him start his sports career, as well as his father's fight in the German army in the siege of Leningrad.
I personally appreciate the fact that he made a call and gave his message through his private life, instead of remaining silent in the face of what happened as an athlete and a player. I think I wouldn't be exaggerating if I said it was the strongest message ever given to the Russian people.