Berlin remains in the red and white of Union Berlin after the Köpenick side humbled city rivals Hertha 3-1 in the opening game of their Bundesliga campaign on Saturday. Union have now won the last four meetings, in league and cup, against Hertha having firmly established dominance in the capital derby. Jordan Siebatcheu’s brilliant near-post header opened the scoring in the first half before Sheraldo Becker and Robin Knoche ensured a comfortable victory after the break despite Dodi Lukebakio’s late consolation. It is a second loss in two competitive games for new Hertha coach Sandro Schwarz, w…