"He is even better than I thought. If you see him doing things in training you see the details which he can transmit in the games," said Hiddink.
"My respect has grown and I rate him rather highly. I cannot say one or five, but I think he is one of the top players in the world.
"Frank is a terrific example of what we expect from a professional player in his attitude and commitment. He is one of those players where sometimes you have to say 'Please, a little bit down, don't go over the top'.
"I like that very much. Sometimes you have to protect them a little bit because they are over-committed."