Coughlan tweaked a hamstring last weekend and Collins rates the Kilmurry-Ibrickane player as touch- and-go.
Collins, in keeping with his practice all year, will leave it until this evening before confirming his starting team.
But he confirmed exciting young forward Martin O’Leary and Damien Burke are both out until August.
Collins accepted a repeat of the stuttering display that eventually saw them past Limerick won’t be good enough in Killarney.
He admitted: “We were disappointed with how we played. We expected a really strong challenge from Limerick, they knew us inside out and would have been well prepared for us but what we talked about doing and what we did do were two different things. Obviously, that performance won’t do.”
Meanwhile, the Kilkenny team to play Dublin in tomorrow’s Leinster SHC semi-final in O’Moore Park (7pm) shows five changes from the defeat to Clare in the Allianz HL Division 1 semi- final. With Shane Prendergast injured, Paul Murphy returns to the full-back line, Cillian Buckley moves to wing-back from midfield, where Conor Fogarty partners Lester Ryan. Conor O’Shea drops to the bench.
The Fennelly brothers, Michael and Colin, are back from injury and are named in attack, where Eoin Larkin makes his first appearance of the year after a tour of duty overseas with the Defence Forces. Richie Hogan is injured and John Power and Kevin Kelly are named among the subs. The team features 12 of the side which began last September’s All-Ireland final win over Galway.
Elsewhere, corner-forward Brian Egan is the only debutant in the Sligo team for Sunday’s Connacht SFC semi-final with Roscommon in Dr Hyde Park (4pm).
Having missed the 2015 season, Adrian McIntyre comes in at centre-back while 2010 All-Star Charlie Harrison returns after a cruciate injury and is named at number 12. For Roscommon, Senan Kilbride for Diarmuid Murtagh is the only change since the win over Leitrim, though only six of the side which began against Sligo last year are named.
See Digest Page 20 for teams