Senior eurozone officials have discussed the scenario of a default by Greece if talks with its creditors fail, European sources told AFP on Friday, ratcheting up the pressure on Athens to bow to tough reform demands.

"In discussions, a default was mentioned as one of the scenarios that can happen when everything goes wrong," a eurozone official told AFP on condition of anonymity.

Another official source said: "Eurozone members have decided to start considering the consequences of non-payment (by Greece) and beyond."