My team sport predictions with tiers (I prefer doing it this way instead of just handing out G, S & B):
I'll put an * next to not already qualified teams (in some cases I'll be considering the chances of two teams that can't both qualify, eg. Slovenia and Greece in men's basketball).
These are tiers that grade the teams according to my perception of their chances to win a medal (ANY medal, not just gold). Though if I rate a team in the highest tier ("very likely to win a medal") it also means they're the main gold medal favorite for me.
If you see that a qualified team is not included in any tier then it means I believe the medal chances of that team are rather marginal.
I opted to skip 3x3 predictions cuz my knowledge is not deep enough (I follow the results but I'm not too aware about roster changes from tournament to tournament and such).
Tiers...
Tier 1 - Very Likely to win a medal
Tier 2 - Likely to win a medal
Tier 3 - In contention for a medal
Tier 4 - Outside chance of a medal