After a difficult start to his Old Trafford career, former United defender Evra believes Martial is capable of kicking on and becoming a top striking option for Ole Gunnar Solskjaer's side.
Before last night's victory over Brighton, Evra said: "From now on I think United are going to get the best out of him, not because of the hat-trick, but because he wants to be there for the club now.
"He can destroy any defender if he decides to, no defender can handle him.
"That is why he frustrates a lot of people because they know his talent. He is one of the best strikers, but he lacks the aggressiveness, that hunger and anger."
He continued: "They let him down when they swapped the shirt with Zlatan (Ibrahimovic).
"We were in the national team [together] and he received from the call and they said, 'you have to give your No 9 shirt'. And he said, 'no absolutely not'. "But afterwards, (Jose) Mourinho contacted him and said, 'Zlatan is going to take the No 9 and you're going to take the No 11'.
"It's not going to be like I'm going to say Martial has not been playing well because of that shirt No but it starts from there.
"I remember at the start of the season I went to Carrington, and Martial was really upset and really frustrated because he was injured.
"And I was like, 'wow that's really impressive because last time I saw you weren't having that enthusiasm and now you're injured you want to come back really fast and to make sure you can help the team'."