Axel Witsel is expected to give his decision over the next 24 hours, whittling his options down to Napoli and Everton.
Sky Sport Italia claim that other alternatives, such as Liverpool, Juventus, Roma and Milan, have been discarded.
The Belgium international midfielder is due to make his choice tomorrow.
Although there have been reports of a much bigger offer from Everton, Zenit are prepared to let Witsel go for €15m.
He is only under contract with the Russian club until 2017 and made it abundantly clear he wants to move on.
Axel Witsel is expected to give his decision over the next 24 hours, whittling his options down to Napoli and Everton.
Sky Sport Italia claim that other alternatives, such as Liverpool, Juventus, Roma and Milan, have been discarded.
The Belgium international midfielder is due to make his choice tomorrow.
Although there have been reports of a much bigger offer from Everton, Zenit are prepared to let Witsel go for €15m.
He is only under contract with the Russian club until 2017 and made it abundantly clear he wants to move on.
Napoli hope they have done enough to convince Witsel, especially as they are in the Champions League.