The 22-year-old has been heavily linked with a move away from Juve in recent months, with Arsenal, Chelsea and Manchester United showing an interest.
The Serie A outfit recently revealed that many clubs are prepared to pay between £50m and £55m for the France international.
Marotta claims Pogba has shown no desire to leave, but insists he wouldn't stand in his way if he did.
GETTY
Paul Pogba has attracted interest from Arsenal, Chelsea and Manchester United
If he decides to leave then we can't stop him
Giuseppe Marotta
"Pogba is the protagonist of his own destiny and if he decides to leave then we can't stop him," he said.
"Pogba has not indicated a willingness to leave, though.
"The problem will come when the player is offered a contract that is two or three times what he already earns. We're talking in the tens of millions per year."
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