The Belgium international earned plenty of plaudits for his impressive attacking display in the East Midlands, but De Bruyne believes that the performance of Delph - tasked with filling in for injured summer signing Benjamin Mendy over the past couple of months - was also worthy of praise.
"Delph was outstanding," the Manchester Evening News quotes him as saying. "To play against Mahrez, who was one of the best wingers in the league for years now. "He did a very good job. [Riyad] Mahrez didn't create much against him."
Skipper Vincent Kompany was deemed lucky to remain on the field following a last-man challenge on Jamie Vardy two minutes into the match, but De Bruyne believes that referee Graham Scott made the right call by showing just a yellow card.
"I don't think it was a red because it was on the turn, and also I don't know if he was alone because he went between the two defenders," he added.
"I guess it's not a red card. Obviously, it's a direct challenge so it was possible, but it was early in the game and not really clear so I think a yellow card was the right decision."