They face a police exclusion zone to stop them entering the capital and many will have to use public transport to attend the rally.
But if no agreement can be reached on how to enact such plans, the euro zone will face a "severe and fundamental challenge, " he added.
Blackburn refused to lie down however, and having won a face-off in the opposing zone, were able to force the puck over the line, to set up a grandstand final minute's play.
Assuming bondholders stand firm, then euro-zone governments face a straight choice: Either they step in to take a share of the losses for the first time in the crisis or they allow Greece to default, something they have fought hard to avoid for the past two years.
WSJ: Agenda: Greek Situation Is Most Serious of Latest Euro Crisis
That was made clear Sunday, when at least 18 people were killed in a face-off between members of a local cartel and a Mexican cartel in a frontier zone between Mexico and Guatemala.
But Fulham are only above the drop zone on goal difference and face a trip to eighth-placed Portsmouth on Sunday.
Predictions that the euro zone will face little more than a shallow recession in 2012 increasingly seem to be wildly optimistic.
But despite having shared a single market with one currency for nearly a decade, the euro zone has never established the polticial and regulatory integration that would allow it to face a crisis of such proportions as one.
There is a risk that some euro-zone commercial banks could face heavy losses on their exposure to the Greek economy.
To use an apt football analogy, just a month ago George Allen was in the open field gliding towards the end zone with the ball under his arm and a smile on his face.
Even with a newly expansionary ECB and governments delivering on reforms, the euro zone is certain to face further testing times this year.
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