Yeah in Spain the release clause is more of an agreement than a release clause your right, well Sid Lowe is. But its not into play in Matas case, 25 mill euros is what they want and thats the agreement fee the club can sell at and not the mark he can recind his contract and just leave the club (i.e AVB). That's why Aguero isn't easy he has 'an agreed selling price' clause rather than an actual release clause... But like I said, doubt this will be an issue with Mata since Valencia will cash in a 24 million euros profit on him and imo Piatti is his replacement at LW, but I really don't think agreement/release clause distinction is an issue here.