Roberts said: "I've heard the rumours about Tugay going to Manchester City. It would be a shame if Tugay wasn't doing something in the game, but, at the same time, I think we might have missed a trick losing Tugay and letting him go to a rival.
"He's been a great player for Blackburn and the main thing is that football retains a man of his talents. If he can go on and get a job with City, it will be great for him. He has his eye on coaching so good luck to him but, speaking as a Blackburn player, I think we might have missed a trick.
"I'd have liked to have seen him stay on in some capacity. I think if you asked anyone at the club, they would have loved to have kept Tugay around the place. He was a special player and also a great guy. We'll definitely miss him."