Roma have agreed a deal worth €10m and percentage of his future sale with Dynamo Moscow, but Gerson is haggling over personal terms.
Multiple sources state the two clubs are in full agreement and ready to complete the transfer with a medical on Monday or Tuesday.
However, new reports from Sportitalia this evening suggest Gerson is holding up the move.
He wants improved personal terms, but is also not entirely sure he wants to go to Moscow at all and is holding out for a better destination.
Gerson spent this season on loan at Fiorentina, but they did not take up his option to buy.
Roma had also worked out a deal with Genoa only for the Brazilian to reject it, so they are becoming increasingly frustrated with the midfielder.