Since the new radical left Greek government was elected in January, talks with creditors have failed to make much headway. Relations between Yanis Varoufakis, Greece's finance minister until last week, and many of his peers in the eurozone were particularly frosty.
Convincing them that the Greek government is serious is the task facing Varoufakis' replacement, Euclid Tsakalotos, at Saturday's meeting.
"We are still a long way out, both on the issue of content as on the tougher issue of trust," said Dijsselbloem.
Meanwhile, Italian Finance Minister Pier Carlo Padoan sought to downplay expectations that a decisive deal over Greece's bailout request will emerge at Saturday's meeting of the eurozone's 19 finance ministers.
Arriving for talks in Brussels with his peers in the 19-country eurozone, Padoan said the purpose of the meeting was "not about striking a deal tonight."
The ministers will assess Greece's bailout request and its accompanying economic reform proposals, which won the overwhelming backing of the Greek parliament early Saturday. On Sunday, the European Union's 28 leaders will meet to discuss the Greek crisis. Without a bailout deal, Greece faces the prospect of going bankrupt and leaving the euro.
"We're here with an open mind to reach a green light, an OK, for tomorrow's negotiation," he said.