Exploring transfer fee disputes

I’m looking at how Racing claims they inserted 15% of future transfer fees to avoid "plusvalía" payment. Some Spanish clubs define "plusvalía" as capital gain above €5m. If Barça sold a player for €5m, there's no gain owed. Racing alleges Barça undervalued a transfer to avoid payments, packing value in variables not counted. There are past legal cases like Las Palmas vs PSG regarding similar disputes. Barcelona denies any wrongdoing, and this case is ongoing in court.

简要概览:

需要我帮你查具体金额、诉状要点、双方官方声明和原文链接吗?
