Their last two encounters went to penalties , so I don't see Greece walking them over on this one, it's going to be a close game and maybe Montenegro getting a narrow win.
I'm walking this one with some few believers.

Montenegro is free falling and losing their respect in last few years while Greece is as strong as ever. Now that all could have changed in last year while there were no tournaments but I was too lazy to check that in more depth. Just played it on hunch.
I know but the fact that Greece could not beat them in regular time and needed PK to win in both World Championship and Olympic should means something right ? - it has always been a 50-50 game between this two side. Greece - tactical, Montenegro - Physicality. Let's have it.
Most people went by the odds and not current form- just gonna be one of those bookies favorites getting battered.