Second-half goals from Sheraldo Becker, Kevin Behrens and an own goal from former Union player Genki Haraguchi took the third-placed side to just two points behind leaders Borussia Dortmund and one back from champions Bayern Munich.
Dortmund and Bayern clash later on Saturday.
"Our first half wasn't good, but the coach chose the right words in the dressing room. We came out, scored three goals, and that's what matters in the end," said Becker.
"After half-time, we played like we should," added Union manager Urs Fischer. Читать дальше...