AS Roma are in talks to sign the French midfielder.
“I will count on Nzonzi until the club tells me otherwise," said Machin.
“He is an important player with quality beyond the norm, so he won't be allowed to go for a cut-price fee. Sevilla have made it clear that N'Zonzi will leave for the figure of his release clause or at least something close to it.
“If anyone wants the player, they must reach an agreement with us first."