The play Portugal in the Aviva Stadium tomorrow.
Republic of Ireland defender Dara O'Shea feels tomorrow's World Cup qualifier against Portugal is a 'huge opportunity' for the team.
Heimir Hallgrimsson's side need a positive result at the Aviva Stadium in order to set up a must-win clash with Hungary in Budapest on Sunday.
O'Shea says they believe they can turn over the Nations League champions:

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