Greece has repaid 3.4 billion euros ($3.79 billion) due to the European Central Bank, a source close to the Greek government said after the launch of a massive new reforms-for-bailout deal.
Spanish lawmakers overwhelming approved Greece's third bailout package following a debate in parliament which the ruling party used to defend its economic record.
German Chancellor Angela Merkel and her hardline Finance Minister Wolfgang Schaeuble on Sunday hailed a dramatic change in Greece's approach to its debt crisis.
Eurozone finance ministers approved Friday a third debt bailout worth up to 86 billion euros to keep Greece afloat and avoid its chaotic exit from the single currency bloc.
Greek Prime Minister Alexis Tsipras warned that a German proposal to give his debt-ridden country a bridging loan rather than agree a new bailout would be "a return to a crisis without end".
The United Nations warned that migrants landing in Greece were facing "shameful" conditions, with the crisis-hit country claiming it was unable to cope with the massive influx on its Aegean islands.
Greek Prime Minister Alexis Tsipras and French President Francois Hollande agreed that Athens and its international creditors "can and must" reach a bailout deal after August 15.
French Finance Minister Michel Sapin said in an interview that his German counterpart Wolfgang Schaeuble was "wrong" to propose a temporary withdrawal from the euro for debt-laden Greece.
Greek lawmakers are set to vote on a second batch of reforms that must pass if Athens is to receive its third huge international bailout, in a key test of Prime Minister Alexis Tsipras' authority.
Greece's government has "no intention" of calling early elections while in the throes of finalising a deal with its eurozone partners on a new bailout.
Ukrainian Prime Minister Arseniy Yatsenyuk said Wednesday that Greece could learn a few lessons from Britain about how to implement austerity measures.
Greek Prime Minister Alexis Tsipras was Tuesday to hold meetings with his parliamentary majority, faced with the tough task of selling a new bailout deal.