Manchester United manager, Louis van Gaal believes he will have left the club before Martial reaches his peak.
Martial was exceptional for United in the 3-0 win over Stoke City, scoring one and assisting Rooney’s goal.
And LVG didn’t expect the youngster to make such an impact so early on in his United career.
“It is very much surprising,” he said. “You come from the French league, come to the Premier League and you do this at 20 then you have a lot of potential but then I am the manager not any more at that time when he is at his best.”
Martial’s impressive form has seen some United fans call for him to be deployed in his favoured position up front.
The 20-year-old has predominately operated on the wing this term, but Van Gaal insisted he will not be moved into a central role.
“That is dependent on the shape of the team, his fellow players,” the Dutchman said.
“He likes to play in a striker’s position more than where he is now playing but when I need him to play on the other side. When he plays like this I am not changing. Same as Rooney, same as Mata. I am not changing.”