Simple. Make an offer of 30+ million pounds in the first week of your game (it is CRUCIAL you make the bid extremely early). They should accept, offer him a contract and you've got him. The trick is to make an offer before he has played a game for Santos. That is the trick with every player. (e.g. Gotze, you can get him for 55 mil pounds at the beginning before he has even played a friendly. If you wait, even if he has only played a friendly or two, his price will increase by at least 20 mil.)