BRUSSELS/ATHENS Greece has three days to reassure Europe and the IMF that it can deliver on conditions attached to its bailout in order to receive its next tranche of aid, four euro zone officials said on Tuesday. 
 
 The lenders are unhappy with progress Greece has made towards reforming its public sector, a senior euro zone official involved in the negotiations said, while another said they might suspend an inspection visit they resumed on Monday. 
 
 Athens, which has about 2.2 billion euros of bonds to redeem in August, needs the talks to conclude successfully. 
 
 If they fail, the International Monetary Fund might have to withdraw from the 240 billion euro ($313 billion) bailout to avoid violating its own rules, which require a borrower to be financed a year ahead. 
 
 That would heighten the risk that concerted efforts by policymakers over the past nine months to keep a lid on the euro zone crisis could unravel, at a time when tensions are rising in other troubled debtor countries. 
 
 Athens is scrambling to bridge differences with troika inspectors and wrap up the review by the end of this week, a Greek coalition official who took part in the talks told Reuters on Tuesday. 
 
 "Negotiations must be concluded by Saturday or Sunday at the latest in order to have a (troika) staff agreement that will be discussed at a Eurogroup meeting on Monday," said the official who declined to be named. 
 
 The two sides had yet to agree on how to plug a fiscal gap and Athens has missed a June deadline to place 12,500 state workers into a "mobility scheme", under which they are transferred or dismissed within a year. 
 
 Tensions over bailout terms have also mounted in Portugal, where Finance Minister Vitor Gaspar, the architect of its bailout measures, resigned on Monday and was followed on Tuesday by Foreign Minister Paulo Portas. 
 
 In Italy, Prime Minister Enrico Letta called a government meeting after a coalition partner threatened to withdraw, demanding faster moves to make the economy more competitive. 
 
 Athens and its creditors resumed talks on Monday to unlock 8.1 billion euros ($10.6 billion) of rescue loans, after a two-week break during which the government almost collapsed over redundancies at state broadcaster ERT. 
 
 "All agreed that Greece has to deliver (pledges) before the Eurogroup on Monday. That's why they must present again on Friday," a second source told Reuters. 
 
 Euro zone finance ministers are scheduled to meet on July 8 and discuss Greece, which is in its sixth year of recession with unemployment at record highs. 
 
 MISSED DEADLINES 
 
 "It is a very difficult negotiation," a senior Greek official participating in the talks said. "We're moving fast to wrap up as many issues as possible as soon as possible." 
 
 But Greece's financial overseers - the IMF, the euro zone and the European Central Bank - were unlikely to be able to conclude their review in July and might need to suspend the visit and resume it in September, a senior euro zone official said on condition of anonymity. 
 
 Representatives of the EU-IMF-ECB "troika" have been holding serial meetings with government ministers in Athens on a host of outstanding issues. If talks are not concluded by the middle of the month, Athens risks missing the installment, the Greek official added. 
 
 Athens and the troika are at odds over an unpopular property tax and a sales tax for restaurants, while a shortfall of more than 1 billion euros has emerged at state-run health insurer EOPYY, meaning automatic spending cuts may have to be agreed to bring it back on an even keel. 
 
 The government plans to ask its creditors to lower this year's privatization target of 2.6 billion euros after failing to find a buyer for natural gas company DEPA. 
 
 The beleaguered government of Prime Minister Antonis Samaras has ruled out imposing any new austerity measures. Unemployment has hit a record 27 percent and Greeks have lost about a third of their disposable income as a result of bailout policies. 
 
 ($1 = 0.7672 euros) 
 
 (Reporting by Reuters bureaus; Editing by John Stonestreet/Ruth Pitchford) 

 European bailout negotiators have said Greece has the rest of the week to prove to lenders it can deliver on the conditions for the next tranche of aid. Officials have signaled their doubt about the progress made. 
 
 Athens and international creditors resumed talks on whether the crisis-hit eurozone member qualified for billions of euros more in bailout funds. 
 
 Negotiators told Reuters news agency that there was a general dissatisfaction with progress in Greece when it came to reforming the country's public sector with a special emphasis on tax and custom collection as well as an improvement in health care services. 
 
 Eurozone finance ministers are scheduled to meet on July 8 to discuss the situation in Greece, meaning the government in Athens has only a couple of days left to reassure lenders it has actually done its homework to qualify for the next bailout tranche. 
 
 Not on the same page 
 
 Greek media reported that the EU and the International Monetary Fund might refuse to pay the full sum in one go and break it up into three monthly payments instead. 
 
 0:00:00 | 0:00:00 Greece's administrative reform 
 
 Greek Economics Minister Kostis Hatzidakis told Tuesday's edition of the German daily "Die Welt" that he didn't rule out another massive write-down on debts despite strong German opposition to such a move. 
 
 "If we are reliable and are able to surprise our partners positively with our savings efforts, I'm sure they will be ready to show their solidarity with Greece," the minister said, indicating that he'd love to see another haircut in place in return for the country presenting a structural budget surplus. 
 
 Ahead of a general election in his country in September, German Finance Minister Wolfgang Schäuble has repeatedly ruled out a second haircut. He's to travel to Greece later this month to discuss ways of increasing bilateral aid for the southern European nation. 
 
 hg/dr (Reuters, AFP)
– Greece has until this weekend to convince the IMF and Europe that it can meet its bailout conditions, before they call off their current site visit and yank the next tranche of aid, sources tell Reuters. Eurozone finance ministers are meeting on Monday and "all agreed that Greece has to deliver" pledges before that, a source says. If they can't finish the site visit this month, they'll have to put it off until September—which would mean Greece missing out on aid. Without the aid, Greece will miss an August deadline to redeem $2.7 billion-worth of bonds, and if it fails to do that, IMF rules require that it abandon the bailout altogether. The creditors aren't happy with Greece's progress so far; it's already missed a June deadline to reassign or dismiss 12,500 state workers, and has a $1.3 billion shortfall in its state-run health insurer. Greece's economic minister also told German media today that he wasn't ruling out another massive debt writedown, Deutsche Welle reports.