The finnish national team have gained a lot of self-confidence after the 1-1 draw to Spain. After this match they beated Luxembourg easily 0-3. If you look at Finland's stars, one of them should be Teemu Pukki who is playing for Schalke 04 and scored the only goal against Spain. Finland's goalkeeper Mäenpää is in a wonderful form too; played a great match against Spain and conceded 0 goals against Luxembourg.
Belarus is on a two win streak, both wins against worse team than Belarus; Canada and Estonia. Before that you can see a loss to Jordan and a draw against Hungary. The one player that you could recognize from the Belarus team is Alexander Hleb, who plays at the moment for BATE Borisov, but has played for great teams like Arsenal and Barcelona. He could be the danger team for Finland. But it's going to be unlikely that he will score some goals if he won't have good supporting play.
I presume Finland are going to win this one 2-0 or 2-1.
Have a nice time betting!