Coppell told the Reading Evening Post: "He is definitely right up there with the best of them, because of his character as well as ability.
"I would never say one is a better signing than another, but his contribution and commitment, in an age when it is easy to think the grass is greener on the other side, is terrific.
"There are times he could have been a prima donna but he has continued to play his football in an exceptional manner for his country and club.
"He is the kind of player managers and coaches dream about in an age where agents have a lot of influence and there are a lot of other agendas.
"He just gets on with the job. If he has missed any training sessions I could count them on the finger of one hand since he has been with us. There are not many players like him."