Maybe in Dortmund's match with Chelsea it will let Chelsea win, but it is possible that when there is an opportunity to score, Dortmund will do it. Meanwhile, Dortmund will take advantage of Schalke because it is a very easy opponent to beat. Dortmund should be able to score more than five goals so that they can win the first position and shift Bayern Munich from the top position of the standings.
Dortmund scores an average of 2.5 goals per game in the last 10 games, so we can assume that with such an opponent as Schalke, the figure will be at least two goals. But I don't think that now anyone cares about goal difference and secondary statistics, especially when there are important games in the Champions League and there is still a long distance to the end of the championship that will require a lot of strength.