League Transfer Sankey Diagram

The width of each edge represents the transfer frequency from the selling league (left) to the buying league (right).

• The graph illustrates the migration of players between leagues.
• Thicker edges indicate relatively strong connections for the corresponding leagues (e.g., FRA to ENG).
• It can be observed that football leagues in England and Spain have the highest player import, indicating higher talent attraction in those leagues.
• The football league in France has the highest player outflow, indicating its role as a "springboard" for players.