Inter have had an offer accepted for the striker, having agreed to pay €20.2m to activate his release clause.
Clarin reports the actual cost will be around €26.8m, with 15 per cent going to the player, then taxes and agent fees.
“It will depend on the will of the player," Victor Blanco stated.
“I was confident we could get more money, I said that to Rolando [Zarate, Martinez's agent]. The lad was fundamental, he loves this club very much."