The young defender has actually angered management for doing extra training on his own.
Holland captain Van Persie remarked to ANP: "I like the fact that such a young boy sees his shortcomings and wants to improve. He wants to be better and is doing something extra to make that happen. He should be applauded.
"I'll confess something. I still played football on the street in Rotterdam when I was playing in the first team of Feyenoord. I've never said anything about it. I was never injured. I also became not the worst footballer."
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