It was embarrassing for Dortmund to concede four goals against a smaller club, this is the first time I've seen a club with that name. I was shocked that Dortmund failed to score a single goal against BG Pathum United, and some of their key players were available. I believe their performance has weakened since their Champions League final defeat, and they have yet to return to their best form. Although some people believe that it is just a pre-season game, it does not mean that they would become weak in the league games, that was poor. 4:0 is a huge number of goals for a big club like Dortmund.
However, I believe the pre-season games are important for winning because they seem to determine the way they will perform in league games. Today, Dortmund will face another unknown team, Cerezo Osaka, if Dortmund loses today, I think the new manager must deal with the issue before the start of the Bundesliga games because if they continue in this way, they will be eliminated even in the Champions League competition.
This is just an ordinary friendly game and not to be taken seriously because some players plays pre season matches with carefulness so that they don't sustain injuries that may rule them out from playing their league games in the early start of the season so we shouldn't take friendly games serious at all however, any team can lose a match regardless of who they play because some of this mediocre teams are also doing well in their respective leagues just that those leagues are not too recognized like the traditional European teams that are always the center of attraction from fans all over the world.
Pre season matches doesn't determine how well a team will perform when the league starts, after all Manchester City lost to Celtics in their friendly game but that doesn't imply they are weak or Celtics is better than them because if it was to be a competitive match Celtics can't even score against Manchester City but since it just a friendly match there's nothing to take seriously there so same thing with Borussia Dortmund match against BG Pathum United, a team from Thailand. For Cerezo Osaka Borussia Dortmund has already won them by 2:3 so that's how pre season matches are, the outcome of pre season matches should not be taken to heart.
It's just a pre-season game, but it looks embarrassing to me if any of the big teams lose. In pre-season games, second-tier players are given enough time to show how well they can perform on the field, this is their chance to put their strength and compete for a spot among the first starting players. However, if the important players are on the field but the club fails to win its pre-season game, it will decide how well they perform throughout the season.
Manchester City, on the other hand, lost to Celtic and AC Milan, both teams play in the top leagues. Even if it is a match that is competitive I believe they will have a chance to score against Guardiola since no team should be underestimated at this moment. If Manchester City fails in pre-season games, I won't expect them to perform poorly next season because they have the best manager, Guardiola understands how to manage his club, he has been there for many years and won many trophies. Dortmund has hired a new manager, and I believe the pre-season games are critical for them to win.