This paper contributes to the understanding of the modern sports industry in an international context. Two alternative approaches are adopted for establishing the hierarchy of team-sport leagues globally and researching to what extent professional European football might have gained dominance relative to the major North American sports leagues. We first study the evolving economic situation of the main European and American sport leagues, in terms of total revenues and broadcasting revenues. Then, we adopt an approach based on ¿Google Trends¿ records to rank team-sport leagues according to the relative interest shown by the fans. We interpret the evolution over time as changes in the degree of support given to the Top-10 professional sports leagues worldwide. Finally, we estimate pooled OLS and GLS random effects models to examine the empirical relationship between leagues¿ revenues and Internet searches to understand the prospects of the leagues concerning their popularity and potential revenues.