Starsport understands that José Mourinho was desperate to get another defender.
The Red Devils were linked to Tottenham star Harry Maguire of Leicester and Jerome Boateng of Bayern Munich.
But it was Alderwerield who Ferdinand expected to move to Old Trafford.
"I was in favor of bringing Toby Alderweireld of the Spurs, "said the expert BT Sport.
"Man Utd linked up with Tottenham star Toby Alderwerield"
"When I play regularly, I think it is within the first two or three centers in the country, in this league.
"I think he's a fantastic player, he proved it again in the World Cup after not having played so many games last season.
"I thought it was final, that it would have been my option to go to be honest."
Ferdinand admits that he would love to see Real Madrid star Raphael Varane showcase his stuff at Old Trafford.
However, he can not see the Frenchman leave the Bernabéu soon.
"From the likes of Raphael Varane, who has proven to be the best defender on the planet at this moment, I think he will be too far to go looking for him, the amount of money," he added.
"I do not think Real Madrid would sell."
Ferdinand recognizes that Maguire needs another year at King Power Stadium before joining a club as big as Manchester United.
"Maguire had a fantastic tournament," said Ferdinand.
"I just think that for his development another season in Leicester, honing his craft within the Premier League, which is a different stage, a different animal to the World Cup, I think it would be the best for him from a personal point of view to he".
Maguire played for Leicester against United last night.
The goals of Paul Pogba and Luke Shaw helped the team of Mourinho to win 2-1.
Speaking after the crash, Maguire's teammate, Ben Chilwell, said there is no possibility of Maguire leaving in January.
"It's great to have Harry back," he said.
"We all know what Harry is capable of, we all know how good he is.
"He could have come here today and his head could have been everywhere, but he did it brilliantly
"He's a Leicester player, he wants to play for Leicester.
"He has made it clear to all of us.
"He's going to be here for the whole season."
"He's going to be good for us." We saw that again tonight, what a good player he is.
"We are all happy that he has stayed."