Dortmund almost became German champions last year and only some sort of curse prevented them from beating Bayern. So Dortmund is a very strong team that can play on equal footing with the strongest groups, which is proved by the fact that from the group with PSG, Newcastle and Milan they went to 1/8 Champions League.
They should have won the match with PSV, but the referee awarded an extremely controversial penalty, which should not have been awarded, because the Dortmund player played into the ball, not into the feet of the PSV player and because of the referee's mistake Dortmund lost 3 points.
It’s good that this is only the first match and this penalty was not decisive. I think that a draw in an away match is not the worst result, of course they would like to win away, but after this match PSV is in a more difficult situation, since the match in Germany will definitely be more difficult for them. This is not the first time that a referee's error has affected the final result. In the second match, Inter managed to beat Atletico, I didn’t expect that they could win, I expected that the match would end in a draw. Now Atletico will have to correct the situation in Madrid...