Sports are the most popular form of entertainment in the world, and football is the most popular of all. Over the years, he has developed in all segments: tactical, strategic, technical and physical. Technology, which is receiving more and more attention, is also responsible for this development. The aim of this work is to bring football and the technology it uses off the field and on the field closer to the reader. In the first part of this paper, emphasis is placed on a kind of cooperation between technology and football. It ranges from the oldest usage all the way to complex analysis and machine learning methods. The systems used by football teams to gain a competitive advantage are listed and explained. The second part of the paper talks about the meaning of discovering knowledge in databases, in which other industries this scientific discipline is used and why it is so important for the world in which we live. Various methods of discovering knowledge from databases are also presented, among them cluster analysis, which will be used later in the research. Finally, author's research based on a database containing data on football teams competing in the top 5 leagues in the world in the 2021-2022 season is left. This is data such as the number of goals scored, the number of yellow and red cards received, possession of the ball, etc. On two occasions, the method of clustering or cluster analysis was used. The conclusion of the paper is that the English Premier League is the best and most watched league for a reason and that the best football teams play high-intensity, very attacking football and try to keep the ball in their possession as long as possible.