India, Nov. 18 -- The long-brewing rupture between Kylian Mbappe and Paris Saint-Germain spilled fully into public view on Monday as their dispute arrived at the French labour court, instantly transforming into a high-stakes battle of financial claims that dwarfs even the scale of their sporting split.

Mbappe, now with Real Madrid, is seeking 263 million euros ($304m) from his former club, alleging unpaid wages and bonuses, compensation tied to what he argues was the misclassification of his contract, and damages for what he describes as moral harassment and breaches of the club's duty of good faith. PSG, in turn, is demanding an even larger sum - 440 million euros - citing what it calls a cascade of losses and misconduct by the player d...