Pogue Mahone
Closet Gooner.
Why would a top player give up a (presumably) guaranteed income from his contract with Juventus to take the risk of getting injured in his first game for us and not getting paid for however long? It doesn't make sense.
Presumably because he would have the potential to make shit-load more money changing clubs than he would if he stayed put.
Obviously, the devil will be in the detail but you could definitely come up with some sort of incentive-based contract which he would find appealing.