Martial hit his first senior hat-trick for victory over Sheffield United last night.
"I think it was very important for him to score goals, for every striker it's important, for his confidence," Matic told MUTV.
"I'm happy that our strikers are in good condition, tonight Anthony was man of the match, every chance he had went in.
"Let's see in the future what he can do for us. But I'm happy for him. Congratulations to him."