The Frenchman will be tasked with leading United's attack this season alongside Marcus Rashford.
"Martial has not realised his potential on the left side for three or four years," he told his self-titled Sky Sports podcast.
"Ole Gunnar Solskjaer is probably thinking he wants to play centre forward, he's a good finisher, 'I have to give him that chance'.
"You could argue it's to the detriment of Rashford.
"But if he can get his head around playing on the left and be comfortable and Martial can be a centre-forward then it's worth giving him that chance.
"At Manchester United when there's speculation around Martial leaving there's been a big fear that he will go to another club and become one of the best players in the world because he has got that much talent.
"I think now is the time for Martial to deliver it.
"He is being given his chance as a centre-forward and scored a good goal today."