EU leaders, having tripped over multiple deadlines for Greece to accept a reform plan to unlock €7.2bn in bailout aid, set Saturday as Athens’ last chance to strike a deal or trigger a “plan B” that would attempt to prevent a Greek default from damaging the rest of the eurozone. The Saturday meeting of eurozone finance ministers was scheduled after the group failed for a fourth time in a week to find common ground with Athens despite marathon overnight talks in Brussels between Alexis Tsipras, the Greek prime minister, and heads of his country’s creditor institutions. The talks collapsed on Thursday morning after the bailout monitors — the European Commission, International Monetary Fund and European Central Bank — demanded Mr Tsipras accept a compromise proposal or have the plan presented as a “take it or leave it” offer before the finance ministers.