From the moment the Spanish goalkeeper arrived in England in the summer of 2011, he's been the subject of criticism, with some media outlets reguarly questioning his suitability for the Old Trafford role.
Throughout it, though, Schemichel says De Gea has carried himself with grace.
"I admire the fella,” Schmeichel told PA Sport and the Manchester Evening News last week.
"I cannot remember anyone coming into Manchester United and being criticised the way he was criticised. He was ridiculed every day. He was the subject of every debate in the media.
“Every programme possible was talking about him and debating the situation. Yet he still went out there with a smile on his face."
Of course, the best way to combat criticism is to prove yourself on the pitch and Schmeichel says De Gea can be proud of his performances.
"I admire the fella. I cannot remember anyone coming into Manchester United and being criticised the way he was criticised. He was ridiculed every day."
- Peter Schmeichel