The Colombian has been heavily linked with a switch to the San Paolo for some time and next week appears to be the key.
"Last night there was a meeting to discuss Pablo's contract," agent Luciano Ramalho told Radio Kiss Kiss.
"We are awaiting Napoli's next offer, as the first did not sit well with us. In any case, there are only a few details to sort out.
"It's 99 per cent sure Armero will become a Napoli player on Monday. Pablo is improving, as with his quality and physical strength he is a spectacular player."