Turkey coach Guus Hiddink feels Nuri Sahin made a mistake quitting Borussia Dortmund for Real Madrid this year.
Sahin is still to make his Real debut after being plagued by knee concerns.
Hiddink remarked: "I am very proud that Nuri is on a team like Real Madrid, he will be a great player.
"Anyway, I think he would have developed much more if he had stayed one more season at Borussia Dortmund."