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Yes, Barcelona is lucky enough to be in the same group as Royal Antwerp, Porto and Shakhtar Donetsk, ideally they will get through the group phase easily, but the reality is that we don't know whether Barcelona can get through easily or not.
September 20 they will have their first UCL match and face Royal Antwerp, playing at home will certainly be the basis of their motivation, 3 points are in sight it seems.
Nothing should be easy because each team will give their best to win the match. Barcelona, which actually has superior quality and experience, is certainly expected to win the match easily, but in fact, several mistakes could also make them fail to win the desired points.
Barcelona is playing at home, it's good for them so people will think it's their stage. However, the Champions League has something that is difficult to predict, although we do not hide the fact that a team like Barcelona was able to overcome the resistance of a team like Royal Antwerp without any significant problems. I agree Barcelona can win that match, but I hope it won't be easy.