Pardew has added to Sunderland's sense of loss by admitting that Colback's man-of-the-match showing on Tyneside was the motivating factor behind their summer steal.
"Jack's performance in the derby was one of the reasons I signed him," he said.
"The way he played on those big occasions told me a lot about the player. When I like a player and he performs in the big games it ticks a lot of boxes for me.
"He has been a major thorn in our side in these fixtures so I'm just pleased he's not playing for Sunderland if I'm honest."
The United boss added: "I think he feels a bit aggrieved about the way it ended at Sunderland.
"But I think he's handled the move impeccably because he took a bit of criticism after it and he didn't respond, which I think is the right thing."