It is understood that Marcus Rashford will not stay at United next season if they cannot assure him of 2 things. Firstly, Rashford wants a guaranteed first team place, with the English forward also wanting an assurance that United will be challenging for trophies next season.
The summer market is on its way and Rashford wants assurances that United will sign well, after some disappointing windows in the past few seasons. Only then will he consider prolonging his stay at United.
Rashford wants assurances that the team will be able to compete with the likes of Liverpool and Manchester City, with a 31 point gap between the top 2 and 6th placed United this season showing the gulf in class between United and their two biggest rivals.
In summary, if the transfer window does not bring in some serious talent, Rashford will seriously consider his future. The forward will genuinely consider leaving if they do not consider his request.
Options are not hard to find for Rashford, with La Liga giants Barcelona reportedly considering the Englishman as a potential option should Griezmann's proposed deal not go through.