The Argentine winger says he spoke to the Real Madrid superstar ahead of his move to Old Trafford and was informed of the history and importance of his new shirt number.
And following his £59.7 million move to United, Di Maria insists he will do his best to reach the high standards expected of him and insisted he is happy to play wherever the manager wishes to deploy him.
"I was aware of the importance of the No.7 shirt," he told reporters.
"I wanted to wear this shirt and do as much for the club as Ronaldo and all the others have been able to do. The club wanted me to wear the shirt and I hope I can live up to it."
"It depends on where the manager wants to play me. I came here to work for the team. I will play in whatever position the manager wants me to play in. Any player should want to play wherever for their manager."