Earlier this week, a first bid from Barca was lodged, though it fell short of Martinez's €111m buyout clause.
Instead, Barca offered €70m cash plus Nelson Semedo and Arturo Vidal. It's suggested Semedo is rated at €30m by Barca and Vidal €20m - valuations Inter dispute.
And Tuttosport says Inter have responded with a request to change the players offered.
Inter want Arthur Melo included, along with Jean-Clair Todibo and Carles Alena.