Spain's PM says Greek exit could send message euro is reversible

MADRID (Reuters) - Spain's Prime Minister Mariano Rajoy said on Tuesday a Greek exit from the euro could send a message that the common currency union is reversible and open up the possibility that other countries might follow suit.

Greece looked set on Tuesday to default on a crucial repayment to the International Monetary Fund, deepening its financial crisis ahead of Sunday's referendum on a bailout deal Athens has rejected. Greece's European partners say the vote will be a choice on whether to stay in the euro.