Erling Haaland scored a brace to help second-placed Borussia Dortmund thrash VfL Wolfsburg 6-1 in the Bundesliga on Saturday. Dortmund have temporarily cut the gap to leaders Bayern Munich to six points, just a week before their clash at the Allianz Arena. The Bavarians, however, still have a trip to Arminia Bielefeld on Sunday. Cologne also had no trouble to beat Borussia Mönchengladbach 3-1 after a brilliant first half and win the Rhine derby. Dortmund scored three goals within four minutes after debutant Tom Rothe broke the deadlock in the 24th minute. “I am happy with the game. Nevertheles…