Germany's centre-right government has criticised a leading conservative politician for suggesting that Greece will have to leave the eurozone.
Foreign Minister Guido Westerwelle said "bullying" of Greece must stop.
And in a TV interview Chancellor Angela Merkel said "everyone should weigh their words very carefully".
Earlier, Christian Social Union leader Alexander Dobrindt, an ally of Mrs Merkel, said he expected Greece to leave the eurozone in 2013.
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