Maybe Dortmund don't have a squad as strong as Bayern Munich but they are still able to maintain their level in the Bundesliga. I really like their mentality for years. They have been making a lot of profit in talented player sales and they still manage to stand still in the league despite losing strength.
For example they haven't filled Bellingham's space with a similar talent. His contribution to the team was really significant you know. However they still don't make it a problem for themselves. We are watching them only two points away from the leader and having a winning streak of four games now.