Good teams are made up of players that, when working together, are more valuable than the sum parts. You can assemble any squad of players together and they will be able to play a game of football but those teams that go on to that next level are build around a tactical strategy and contribute to a shared mentality.
No matter the league or the country, that is a universal truth, and it's one of the reasons why I hate the term "underdog" when it comes to Leicester City winning the Premier League title. The truth is they were a squad built to excel in a direct and unrelenting style of play and they did it every week without much fail and nobody knew how to beat that until it was too late.