You don't need to be a graphic designer to create one. The community standard for these maps is , which offers a fully editable template.
The influence of these leagues can be seen in the dominance of their clubs in European competitions. In the 2020-21 Champions League, for example, the quarterfinals featured six clubs from the top three European leagues. football imperialism map editable link
: The map is typically updated weekly or daily as games conclude to reflect the new "imperial" borders. specific rules for a college football (CFB) or NFL-style imperialism game? You don't need to be a graphic designer to create one