European leaders have intensified their efforts to reach a deal over the Greek debt crisis, ahead of an emergency Brussels summit to break the deadlock.
French President Francois Hollande has warned that "everything must be done" to keep Greece in the eurozone.
Greek PM Alexis Tsipras set out new proposals in a bid to prevent a default on a €1.6bn (£1.1bn) IMF loan.
Greece must repay the loan by the end of June or risk crashing out of the single currency and possibly the EU.
Talks have been in deadlock for five months, with the European Commission, the IMF and the European Central Bank (ECB) unwilling to unlock the final €7.2bn tranche of bailout funds until Greece agrees to economic reforms they want to see introduced.
The head of the European Commission presiden't cabinet, Martin Selmayr, said on Twitter that Greece's latest proposal had been received by the country's creditors.
He said it represented a "good basis for progress" before comparing the discussions on a deal to a forceps delivery childbirth.