If it is a 14 million deal (are they covering all of the wages) then that seems pretty cheap. That's pretty much what Adam Lallana's contract and fee will cost them over three years (or half of Joao Pedro's fee alone). They've had a pretty mega year financially and presumably have a bit left over and no primary targets left to go for (after Kudus didn't happen). Fati could go tits up but he goes back after a season so it's not like it's a huge risk that'll end up stuck on their books. If he's mega and helps land them Europe again it's clearly worth it.