Yes , Dortmund is in advantage a bit, but 1-0 victory over Chelsea is not a secured victory in my opinion, and if Chelsea should first just get 1 goal it will worsen the situation for Dortmund and put the whole game into starting afresh. If Dortmund had scored up to 2 goals during their first leg, this could have a kind of sealed the game for them and it would have become difficult for Chelsea to turn around looking at their poor performance. However the match is still an open game for both teams and if Chelsea should put more effort in this game they will be able to qualify having them playing at home.
Of course Dortmund will be wary of this in the second leg, of course the strategy that Dortmund will carry out will be more accurate than the first leg in order to prevent opponents from playing openly in their defensive area.
about 10 minutes from now this game will start I really want to see dortmund advance to the next round even though it will require hard work in this second leg.
potter has very little experience to coach a big team especially in ucl all teams will show their best strength. this is something he must realize in this second leg to be able to break the negative assumptions that are directed at him.
Even though Dortmund had been wary of this game in the second leg, Dortmund appeared to dominate possession which was quite good, even recently the free kick from Reus surprised the Chelsea players but Kepa as the goalkeeper was able to brush it off well, in terms of attack I saw in this match Dortmund still continued attack than Chelsea as the host.
That's a lot of doubts and a few other speculations that Potter hasn't had a good experience in the Champions League. Of course, he will be a bit more difficult to deal with even though he has tried as much as possible, but this time Chelsea's attack was still not too aggressive.