They had lots of opportunities to score goals but unfortunately, in the end, Borussia Dortmund didn't perform brilliantly so they could only score one goal but that was enough for them to get three points because Bremen only had one good chance which they failed to maximize so they had to miss it and This is Bremen's third consecutive defeat.
Dortmund has the opportunity to be at the top of the standings, but when Leverkusen, Stuttgart and Bayern Munich have played their eighth match, the standings will change and will again put Dortmund below the three teams if the three of them succeed in winning over their opponents.
I think what is more important is that Dortmund can manage to get three points and top the standings for a while, before being displaced again by Laverkusen, VfB and Munchen in the next few hours. Even though I didn't show my best game, I really enjoyed the Bundesliga standings as they are now, not always dominated by Munchen like in previous seasons. For me, the Bundesliga this season is very competitive, I am waiting for Laverkusen to take over again at the top of the standings after the match against Wolfsburg.
On the other hand, I think VfB can also secure full points in the match against Union Berlin, considering that Union Berlin is quite stable in terms of failure, I mean they have lost the last five matches. Regarding the Munchen versus Mainz match, I think this match is very predictable, it could be said that Thomas Tuchel squad can secure full points without any significant obstacles.