Eindhovens Dagblad reports Dumfries is to train away from the rest of the PSV squad amid uncertainty over his future.
The Blues have been frequently linked with the right-back, while Inter Milan are also supposedly keen.
The report states that while Dumfries has expressed his desire to leave PSV, he has asked the club to continue training until a move materialises.
However, the Dutch side are only letting him training on an individual basis, and now plan to sell the Netherlands international this summer.
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