"Gerard Pique is a class player," Ferdinand told ManUtd.com.
"Remember, he spent a whole season on loan at Real Zaragoza [in 2006/07] and after that spell there were a few clubs interested in him because of his quality.
"There's absolutely no question that Gerard Pique is a very good player. He's extremely technically sound and he's comfortable with the ball at his feet."
He added: "Like anybody, Gerard wants to play regularly and he might not have played as often as he'd have liked this season.
"But the manager showed great faith in him by playing him against Arsenal recently.
"He slotted in terrifically in that match. It was a massive game and he showed he could play on the big stage when it was necessary.
"That game was really significant to the title race, so he would have had a confidence boost by being selected for that match. He'll know just how highly the manager rates him."