Napoli have made a five million-euro bid for Corinthians centre-back Felipe, according to media reports.
However, the Sao Paulo outfit have placed a six million-euro price tag on the 26-year-old, Xinhua news agency quoted Diariosp as saying on Tuesday.
Citing a source involved in the negotiations, the newspaper added that the "difference between Corinthians' request and Napoli's offer should be resolved in the coming days".
Felipe has made 28 appearances for Corinthians since joining the club from non-league club Coimbra in 2012.