Sean O Brien flew out with the rest of the Irish Rugby team ahead of the World Cup which gets underway tomorrow evening.
Ireland’s first match is against Canada this Saturday at 2.30.
Joe Schmidt will name his team for that clash last this morning.
According to reports Luke Fitzgerald will replace the injured Robbie Henshaw in the centre while Keith Earls will start on the wing in place of Simon Zebo.
In the forwards Iain Henderson is expected to start beside Paul O’Connell.