European Union president Donald Tusk has said a new Greek bailout deal is possible before the end of April, but says it will not come before Easter.
Experts from the IMF and the EU are scrutinising a list of economic reforms proposed by Athens in a bid to unlock another €7.2 billion in loans to stave off possible bankruptcy.
Greece says the reforms would help raise an extra €3 billion for government funds without resorting to wage and pension cuts.
"The process of assessment of this plan is very complex and I don't foresee any breakthrough before Easter," Mr Tusk said.
"I think that today we can say that the (economic) situation in Greece is under control," he told a news conference alongside Spanish Prime Minister Mariano Rajoy.
"I hope we will reach an agreement by the end of April, for me it is possible."
In April, Athens needs to roll over €2.4 billion in short-term debt and repay another €820 million, including €460m to the IMF.
Greek Prime Minister Alexis Tsipras told politicians late on yesterday that he wanted a deal but would not submit to creditors unconditionally.
Mr Tsipras came to power after an election in January on a pledge to end the austerity measures imposed as part of a massive bailout by Greece's creditors, which Athens blames for hammering the economy.
Mr Rajoy reiterated his hope that the negotiations on a new debt deal would be successful and that Greece would remain in the eurozone.
Greece "must understand that for the European Union it is very important that the message that is sent is that the rules of the game must be respected," Mr Rajoy, who has been accused by Athens of taking a hard line on Greece, said.
