That, however, would create a financing gap of up to an estimated €30 billion.
ECB chief Mario Draghi made it clear that those funds would have to come from the eurozone governments, saying the central bank "is by and large done" with helping the country because it is not allowed to finance the debt of its member nations.
Schaeuble, meanwhile, acknowledged the Greek government's progress "despite the protests and the general strike" but he also cautioned that more needs to be done to get its finances under control.
Broad-circulation newspaper Ta Nea daily said in an editorial that Athens must now ensure it receives the new bailout payment in time, and kick start the economy.
"Nobody can imagine that in four months' time (Greece's creditors) will be demanding new salary and pension cuts," the paper said. "Greece cannot take it — and in any case the government will not survive it."
Police in Athens arrested five suspected rioters during the clashes outside Parliament on Wednesday night, on the second day of a nationwide general strike.
Unions have pledged to hold new strikes and protests, and on Thursday taxi drivers and Athens metro, tram and urban rail workers walked off the job.
Baetz reported from Hamburg. Elena Becatoros in Athens contributed.
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