The Republic of Ireland will look to build on last week’s win over Hungary tonight.
John O’Shea’s team play Portugal in Aviero, where kick-off is at 7.45pm.
The game could mark the final time Cristiano Ronaldo plays for his country on home soil.
Northern Ireland are also in friendly action this evening – they play Andorra in the Spanish city of Murcia at the same time.
The Republic of Ireland under-21s are also in action today.
Jim Crawford’s side play the England under-20s in Zagreb from 3pm Irish time.
Johnny Kenny won’t be involved as he has returned to Shamrock Rovers ahead of their game against St Pat’s on Thursday.