Main European football leagues are not financially sustainable. - According to a study by the consulting firm, A.T. Kearney, it is essential that European football leagues change their economic structure if they want to survive. The A. T. Kearney study covered the economic results of the top football leagues - German Bundesliga, the French Ligue 1, the English Premier League, the Spanish Primera División and the Italian Serie A. The model on which the German Bundesliga is based is the most...