Bayern Munich followed up the qualification for the Champions League semi-finals with a 5-1 thrashing of Union Berlin, while Cologne sank even further into the Bundesliga relegation zone after they were stunned at home 2-0 by Darmstadt on Saturday. Coming off a 1-0 mid-week win against Arsenal, Bayern had a slow start but were ahead in the 29th thanks to Leon Goretzka. Union seemed close to an equalizer and goalkeeper Manuel Neuer had rescue Bayern twice, but it was the guests again to find the net with a stunning free-kick from Harry Kane shortly before the break. Goals from Thomas Müller and…