Republic of Ireland:
Martin O'Neill has told his men to remember the success of their Euro 2016 play-off victory over Bosnia ahead of tonight's encounter. After the first leg ended goalless in November 2015, the Irish progressed to France with a 2-0 home win at Lansdowne Road.
"We've had the experience of a couple of years ago almost to the day," said O'Neill. "The evening in Dublin was really fantastic against Bosnia."
A boost for hosts is that David Meyler is set to return after watching the first leg from the sidelines due to suspension.
Denmark:
The Visitors are looking to qualify for their first tournament since Euro 2012 and head into this decisive match with no injury concerns following the first leg in Copenhagen.
Recent form:
Possible lineups:
Republic of Ireland: Randolph, Christie, Duffy, Clark, Ward, Brady, Hendrick, Arter, Meyler, McClean, Long
Denmark: Schmeichel, Ankersen, Kjaer, Bjelland, Larsen, Eriksen, Kvist, Delaney, Cornelius, Sisto, Jorgensen