The former Blaugrana midfielder believes that Los Blancos will win the Primera Division this term, regardless of the outcome of Saturday's Clasico
The Ajax youth coach, who was under contract at Barca from 1998 until 2000, believes that Madrid has made a lot of progress this term, and added that it will not give away La Liga this close to the finish.
"I obviously hope that Barcelona will win the league title, but I have a feeling that Real Madrid won't give this away any more," De Boer said to NUsport.
"Even if Madrid lose Saturday's Clasico, I still think they'll win the title."
"They have made a lot of progress under [Jose] Mourinho. They score a lot of goals and hardly ever concede. I don't think they will win all their remaining games, but Barcelona won't do that either."