The head of the Eurogroup said on Tuesday that a recent shakeup of Greek Prime Minister Alexis Tsipras’ negotiating team would not by itself resolve the impasse between Greece and its creditors, and Athens would need new loans to stay afloat. “Without further loans, Greece won’t make it, that’s the reality,” said Jeroen Dijsselbloem, the Dutchman who heads the group of finance ministers of countries that use the euro.