Lib Dems and Ukip voters thought a Labour government propped up by the SNP would be 'illegitimate'.
Candidate later deleted the tweet but attacked his rival's views on immigration.
German finance minister said Tsakalotos will struggle to 'find a solution' to Greece's woes.
The BBC's director-general says the agreement will secure the long-term funding of the broadcaster.
An Oxford educated academic, Tsakalotos belongs to the hard-line left of the Syriza party.
The Rochdale representative is now seeking help to combat the mental health condition.
Dropping out of the eurozone would be humanitarian disaster for Greece
IBTimes UK explains the impact of the no vote on Greece and Europe.
Tsipras and supporters under impression eurozone leaders like Merkel answerable to no mandate.
The former Labour Olympics minister claims a generation of children have been 'robbed'.
The biggest shock for Labour at the recent General Election was the extent to which traditional Labour voters opted for Ukip.
Journalists face up to two years jail sentence if they report terror figures which contradict government statements.
Will the EU paymasters follow through with threats to boot Greece out of the Eurozone?
Number 10 says Cameron will do 'whatever is necessary' to protect the UK's economic security.
European Parliament President Martin Schulz casts doubt over Greek government promises to reopen banks in the next few days.
BREAKING: Greek Finance Minister Yanis Varoufakis steps down in shocking move after referendum results.
Bookmakers favourite Andy Burnham is listed as second choice, says Unite.
Celebrations broke out in Athens following exit polls that show a clear rejection of the debt deal with the country's creditors.
Greeks party in front of parliament as vote against debt deal appears conclusive.
Don't count on Greece being out of the European Union yet. Treaties say it can't be forced out.
President Barack Obama is optimistic about securing a deal with Iran over sanctions and its nuclear programme.
Polling booths in Greece have closed as intense speculation and rumour take over.
Units of SAS troopers are backing up forces in Syria targetting Isis.
Wednesday's Budget will see BBC's budget cut by a fifth, as well as market rents introduced for social housing.
Outcome of today's poll remains in doubt amid fears of civil war.
Millions of Greeks to decide on austerity terms of international creditors in game-changing referendum.
Chancellor expected to announce tax threshold on properties worth up to £1m.
David Cameron and George Osborne promise to 'take on' opponents to Tory's plans to reduce social housing.
Islamist militants' rockets cause no damage or injuries.
Cuts could threaten infant technology that promises to be central pillar of Britain's emissions targets, says report.