Yes, and I remember the years around 1990 when teams with tall men with a lot of stamina and not much else were giving headaches to top teams with top players. But soccer is also a team sport and there are dynamics that go beyond fitness. The morale of a team has a lot of impact. There have been many cases when the same players started playing well suddenly after a change of the manager. Looking at normal workplaces: fire the boss that hates everybody and everybody hate back, put somebody not abusive or toxic in charge, the workers will start performing better.