This is probably going to be first unfair olympics in history of olympic games, some countries are banned, ridiculous rules, probably no public and fans, man competing in woman category, and who knows what else are we going to see...
Why are you saying this, is there any news link that there are countries banned from participating in this Olympics, I really don't know about this.
Tennis will probably be interesting to watch if Djokovic decides to participate, but he is still thinking about it.
He has already announced his participation through his
twitter and has also been posted by other members
https://bitcointalk.org/index.php?topic=1200104.msg57470713#msg57470713The news of his participation is quite exciting because many top players have withdrawn for various reasons.