so how can he play for russia when he's ukrainian? is ukraine part of russia?
You know there was Soviet Union and when it collapsed ppl had choice, which citizenship to choose. I could have chosen Russian citizenship for example but I am an Estonian by nationality and will always be, doesn't depend on my citizenship now or in the future.
And the same as Medvedev who was Russian by nationality choose to play for Ukraine.
I hope you get the idea. Athletes can change citizenship you know, and other people too.
And there wasn't Ukranian or Russian citizenship before. We were all Soviet citizens. Ukraine and Russia were both part of Soviet Union.