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Barcelona shouldn't be in the list because they're struggling to fit into the system of balance. Pep Guardiola is my own favorite coach, he's important and makes football enjoyable because he's always on the top followed by Real Madrid. A club's level is determined by the performance exhibited by the club and their players. Manchester City remained first because their key players have returned to training, remember Kelvin De Bruyne is back and have scored and aissts for his team unlike some players that have no contribution to the growth of their club.
Barcelona doesn’t deserve to be on the list, in my opinion, because they are not in good shape. They are passing through some difficult times and are looking for ways to continue winning matches. So I think Real Madrid, Inter Milan, and lastly Manchester City. However, Inter Milan are doing very well this season; they play well, and I love the way they dominate all of their matches so far. Real Madrid are also doing well, but where I think I will disagree with you is that when you mention Manchester City first, seriously, Manchester City performance is not up to Inter Milan and Real Madrid performance in the Champions League competition this season, therefore I think Inter Milan should be the first.