Originally Posted by thegreendestiny
Citizens of both countries have equal rights and privileges, can easily switch passport/citizenship to the other without much difficulty. Heck, if Azarenka decides to play for Russia and Sharapova plays for Belarus, it wouldn't be a big deal for their home countries.
You're from Poland so you wouldn't understand.
I'm not from Poland, but I don't understand either. I thought citizens of either country of the Union State would be free to settle within either country, but keep their nationality and passport (a little bit like in the EU).