Understanding soccer as a complex system we base on nature and the collective behavior of many organisms that "do calculations," seeking to generate solutions in a bioinspired way. When soccer mysteries appear, complex systems science emerges as a means to provide explanations. However, given the variety of interpretations that complexity and its associated properties can have and the understanding of what a complex system is, it is convenient to provide some elements to understand how unpredictability in soccer gives way to hundreds of counterintuitive results and how the science of complexity could contribute to the understanding of many phenomena in this sport. In this context, the manuscript's objective is to synthetically address some of the most important aspects of applied complexity to soccer to bring science and sport closer together