The eyes are the only facial part a countryball has. There are several of them:
Can be seen in game and in lobby thing.
Can only be found in lobby and changing room thing when you hover over your character
These eyes can only be found when you lose a match and when you take damage.
Just another version of sad.
Bored or Something
4 Health or lower. it looks bored to me with those eyes
It is very rare. I somehow got a screenshot of it