The London Evening Standard says United owner Joel Glazer believes the 24-year-old is the club's own answer to Pele.
Martial is said to be Glazer's favourite player - hence why the club didn't allow them to leave Old Trafford when Mourinho was in charge.
And it's now down to manager Ole Gunnar Solskjaer to get the best from him.
The United star has been inconsistent but, since the turn of the year, has improved considerably, stepping up in the absence of Marcus Rashford.
Before the coronavirus crisis brought football to a halt, Martial was on a hot streak of four goals from his last six games.