Juventus is reportedly very serious about recruiting Sancho, and they dare to pay him 25 million, Manchester United welcomes it openly. However, the current obstacle is the issue of Sancho salary, which is considered very high. If Sancho is willing to cut his salary, the transfer seems likely to happen soon, Juventus will get a quality winger.
By being eliminated from the Club World Cup, Igor Tudor can focus on improving the depth of the squad, in order to compete for the Scudetto next season. Last season Juventus struggled a lot, they almost failed to finish in the Champions League zone, so clearly the management must improve the depth of the squad in order to perform better next season.
With the current conditions of course Manchester United will be very happy with this offer even though they realize that they have lost but if they continue to let them lose even more so this could be a good decision for them to release Sancho to Juventus.
As for the salary issue, I think this can be emphasized a little because after all, with Sancho's current condition staying at Manchester United is also not an option so it would be very good if he accepted his current condition and started over from scratch including for his salary.
Because the most important thing for Sancho now is to restore lost performance considering that for now he needs a club to support his performance and the EPL is not a friendly place for Sancho if he wants to start from scratch.