Aymeric Laporte is already an important player for Athletic Bilbao, with the dominant centre back already being tasked with marking the likes of Cristiano Ronaldo and Lionel Messi during some of his 83 league appearances in red and white. The 21-year-old has a massive £36.5 million release clause in his contract, though that won't seem like a high price to pay for teams in the real world if they could potentially squeeze a decade of dominance out of him. He's always gaining experience, always gaining fans, and always adding to his value. The sooner you pounce, the better the deal will be for you.