Neymar, left, and Kylian Mbappe both arrived at Paris Saint-Germain last summer and will eventually cost the club a reported €367m combined. Christophe Simon / AFP
Neymar, left, and Kylian Mbappe both arrived at Paris Saint-Germain last summer and will eventually cost the club a reported €367m combined. Christophe Simon / AFP

Uefa face 'difficult challenge' over handling of Paris Saint-Germain's alleged financial violations, say analysts