Portugal is next.

Already happening:

FT.com / FT's rolling global market overview - Euro rally fades as contagion fears grip investors

Relief that Ireland and the European Union have agreed a €80bn-€90bn bail-out has quickly faded as investors note political turmoil in Dublin and worries about sovereign debt contagion remain.
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In addition, it became clear at the start of European trading that while the market was prepared to reduce the premium for Ireland's debt following the bailout, investors were reluctant to believe the agreement signalled the end of the eurozone periphery's fiscal problems.

The yield on Portugal's benchmark debt has edged higher with traders fearing the market will now turn its attention to Lisbon's budget struggle.

FT.com / Europe - Portugal moves to head off market pressure

Portugal has moved to pre-empt the threat of renewed market pressure on its borrowing costs following the emergency financial rescue of Ireland, saying it has a "clear strategy" to reduce its yawning budget deficit and implement reforms to lift economic growth.

In an effort to reassure investors that Portugal would not need a bail-out, the minority Socialist government also stressed in a statement on Monday that the country had a "resilient and well capitalised" banking sector.

The Lisbon statement came as economists said the €80bn-€90bn Irish bail-out package, aimed mainly at assisting debt-ridden banks, might not succeed in preventing the eurozone sovereign debt crisis spreading to Portugal or other vulnerable economies.