Despite some 14 goals from 43 caps, Rooney has never quite fulfilled his potential for the national team since impressing at Euro 2004, which ended with a foot injury as England lost in the quarter-finals.
"I believe that Rooney has a very good chance of becoming truly one of the best in the world," the England manager told the July edition of FourFourTwo magazine. "He´s still young and will have lots of chance to improve."
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