In the Airtricity league Premier division Dundalk go to bottom side Longford with a 4 point lead with 4 games remaining.
If Stephen Kenny's side slip up Cork City can cut the gap if they beat St Pats at Richmond park.
Lillywhites captain Stephen O'Donnell has been ruled out with a hamstring injury while Sean Gannon misses out once again with a calf injury.
In better news Robbie Benson could return.
Kevin O'Connor, Alan Bennett and Kenny Browne are doubts for City.
Kick off is at 8 at City calling stadium and 7.45 at Richmond park
