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.
It will not be easy for Chelsea to win against Dortmund even though the match is at Chelsea's home ground, because on aggregate Dortmund have won ahead of Chelsea in the first leg even though only with one goal. Meanwhile, in the Bundesliga, Dortmund will have a little trouble if they have to score more than five goals at home to Schalke, even though Schalke is a team in the relegation zone. After all, the difference in the number of goals between Dortmund and Bayern Munich is still very large now.