Bundesliga champions Bayern Munich reduced the gap to leaders Bayer Leverkusen thanks to a 1-0 win in the postponed game against Union Berlin on Wednesday. Bayern were trailing Leverkusen by seven points after a shocking defeat to Werder Bremen at the weekend, but with the victory against Union, they now sit four points behind the league leaders. “I was an important win, it wasn’t an easy game. We showed the right reaction after the defeat to Bremen,” Leon Goretzka told broadcasters Sky. The match was originally to take place last December, but had to be postponed due to safety risks and the t…