Italian outlet TMW report Ercolani and United are both keen to agree an extension.
In the background there is interest from Italian clubs, as should be expected regarding the top prospect.
Ercolani, 19, signed for United in 2016 from Forli. He is an Italy under-20 international.
The young centre-back featured in five out of United’s six UEFA Youth League group stage games this season.
He has recently been on the bench for the under-23s, including this past week, and is close to stepping up.
Can he make the breakthrough?
Right now it’s too early to say definitively one way or another, and that’s why United must stick with him.
Ercolani faces a big 12 months or so ahead, and if he can start impressing at under-23 level, he can start to build a case for the first team, or to go out on loan.
It’s never easy to make the breakthrough and Italian youngsters have had mixed success at United in the past. See Davide Petrucci, Michele Fornasier, Pierluigi Gollini, and Federico Macheda.
A new deal for Ercolani gives him a shot. Letting him leave now would be a waste.