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.
Dortmund are in good shape, but underestimating Chelsea is also wrong. I think there are still quite a lot of chances for Chelsea to win and qualify, because they play at Stamford Bridge.
Dortmund in the League itself has the same points as Bayern Munich. They only lost on goal difference. Of course, at this time, Dormund and Bayern Munich are equally busy in Europe. Anyone who makes mistakes in the League will certainly make it even more difficult for them to become champions.