#1 It is a win-win for all three parties involved

Toby Alderweireld is desperate to get his transfer to Manchester United sorted out, and has his heart set on a move to Old Trafford, reportedly issuing an ultimatum to Spurs to complete the deal before the close of the transfer window.
The 29-year-old has just one year left on his contract, and threatened Spurs to play out the remainder of his contract and leave on a Bosman next season, with Tottenham not getting any fee for his transfer.
It is a situation that Spurs would be keen to avoid, and would prefer to get some sizable fee for his transfer rather than lose him for nothing next year, and Manchester United would do well to grant him his heart desires by going all out to get him.
With Alderweireld's heart set on a transfer to Old Trafford, Tottenham keen not to lose him for free next season and Manchester United in need of a quality centre-back, it is a positive business transaction for all parties involved and one that should be carried out before the close of the transfer window.