Syriza, which has a steady lead of around three percentage points in pre-election polls, is trying to strike a delicate balance between fiscal diligence and debt forgiveness.
The left-wing party's plan to renegotiate Greece's multi-billion bailout with the European Union and the International Monetary Fund is already raising hackles among the country's creditors.
IMF chief Christine Lagarde on Monday warned of "consequences" if European countries try to renegotiate their debts.