For the todays evening game between Stuttgart at home against Union Berlin i expect that Stuttgart will be win that.
But it will be not an easy game as Union Berlin is always good for a surprise against good teams.
Normaly based on the performance i placed my bet for a win on Stuttgart as Union Berlin was the last weeks not that good.
The match has been going on for quite a long time and currently Stuttgart is still leading 1-0 against Union Berlin. It looks like your worries are confirmed because Union Berlin is still not capable enough to stop Stuttgart. I think if Stuttgart can score 1 or 2 more goals then victory at home is guaranteed. But if Stuttgart is careless then they have to be prepared for the worst possible result of a draw.