Di Maria, who joined United in a £60m deal last summer, has seen his form fade in recent months.
This has in turn prompted speculation that he could head for the Old Trafford exit door.
Although he has failed to justify his big transfer fee, Ferdinand, who now plies his trade for QPR, believes Di Maria needs to be given time to find his feet.
And he believes that if United are patient with him, then he can become a superstar.
"I thought Di Maria was a great signing for United and I still think he was a good signing because he is a top player," Ferdinand told Goal.
REUTERS
Angel Di Maria has been underwhelming at Manchester United this season
Maybe it will take Di Maria a bit longer. It might take him a year, you never know
Rio Ferdinand
"He was arguably Madrid's best player last year, him and Ronaldo were their standout players. I think he is a highly talented player.
"But it always takes time for a player to adapt to his new surroundings, especially when you go to a foreign league. Not every player can be like Ronaldo and just turn up and instantly become a superstar.
"Maybe it will take Di Maria a bit longer. It might take him a year, you never know.
"But his style does suit the Premier League. He is quick, runs at people, hungry to create chances and commit people. I think he is a very talented player and I like him."
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