The Munster player took part in a training session on Thursday and will now pack down in the Irish front row in Rome.

"Marcus is fine. He had a run-out this morning and so far everything is good. We are 95 percent sure he will be right for Italy," said Ireland coach Eddie O'Sullivan.

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"Obviously, something could flare up overnight, but today I'm happy with his fitness."

Ireland go into the game knowing a win could give them the title for the first time in 22 years but they are dependent on the France and Scotland and Wales versus England results.

Ireland: Girvan Dempsey (Leinster); Shane Horgan (Leinster), Brian O'Driscoll (Leinster, capt), Gordon D'Arcy (Leinster), Denis Hickie (Leinster); Ronan O'Gara (Munster), Peter Stringer (Munster); Denis Leamy (Munster), David Wallace (Munster), Simon Easterby (Llanelli), Mick O'Driscoll (Munster), Donncha O'Callaghan (Munster), John Hayes (Munster), Rory Best (Ulster), Marcus Horan (Munster).

Replacements: Jerry Flannery (Munster), Simon Best (Ulster), Trevor Hogan (Munster), Neil Best (Ulster), Eoin Reddan (Wasps), Paddy Wallace (Ulster), Andrew Trimble (Ulster).

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