Alexis Tsipras is said to be laying out his position to the summit now, reports Ian Traynor in Brussels.
Donald Tusk will then ask ECB president Mario Draghi, EC president Jean-Claude Juncker, and Eurogroup president Jeroen Dijsselbloem for their views.
Draghi is expected to dwell on capital controls and the dire condition of the Greek banks, Dijsselbloem is to brief on this afternoons eurogroup meeting. Junckers contribution is less than clear.
These expositions are likely to be followed by a broader exchange on the feasibility of a new longer-term ESM bailout, the conditionality [the reforms Greece would commit to], the deadlines. Basically, by the end of the evening, they should have decided whether the eurozone and Greece should open a new negotiation. This, from EU sources, is perhaps the upbeat narrative.
The more depressing scenario circulating is of another summit on Sunday, but not of the eurozone but of all 28 leaders, a full EU summit. If that transpires, the meat of the meeting is Grexit.
If a tentative accord to proceed with the ESM option is not looking good by the weekend, The Full Monty of Grexit becomes the dominant narrative, with Draghi throwing up his hands, saying he cant do any more and the Greek banks collapsing.