Heidenheim have not been beaten in 7 of their 8 most recent away matches in Bundesliga
Union Berlin's most recent games have been low-scoring, with under 2.5 goals in their last 8 away matches in Bundesliga
Mainz haven't lost any of their last 6 home matches in Bundesliga
Union Berlin have lost all of their last 3 matches in Bundesliga
Union Berlin have failed to score a goal in each of their last 3 away Bundesliga games
In their last 3 home Bundesliga matches, Mainz have won by 2 or more goals