There are very few top players (let us not go there...) for sale in January which we can use to our advantage. Pogba is not world class but he has a lot to offer so let us sell the guy in January. We have Donny and use the money and some more for Håland, Sancho or Graelish.
Sell Martial and buy Håland, promote Greenwood as his back-up. Rashford to the left and Diallo to the right. If Mbappe is Real-bound we might have a chance, but Barca and Pool would offer serious competition. Sancho is good but Håland is better.