The Colombian has been a World Cup revelation this month.
Martinez, writing in his column for The Times, said: "Of course, there is James Rodriguez, possibly the outstanding individual of the tournament.
"He has all the attributes to be a big star. He has long been seen as a player of huge potential - that is why Monaco spent so much money to sign him from Porto last summer - but this is the stage he has needed to show the world. It is always a pleasure to watch a true No. 10 such as him, a player with an eye for a pass, so much creativity and the ability to score goals.
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