End of next season he has 12 mths left on contract.
The power shifts to the player, he sits it out he gets the money the club gets nothing.
The club play hardball with any club that wants him ,
All they have to do is tell the player to hang in there we will buy you, big wages , signing on fee ect, Southampton get nothing , he will just go through the motions for that season as not to risk the move.
He will still be young and have more money than he has ever dreamed of.
Look at what Barkley did with us same thing cost us millions.