"It's not something I am very angry about but have a minor irritation with. You want to play in your preferred position, where you can play to the best of your ability," said Van der Vaart.
"But when I have to track back, that does not really benefit my game."
The Daily Mail says the Dutchman's comments will alert Europe's elite who have monitored his form over the past 18 months. AC Milan are among his admirers.