Barry Molloy will miss Finn Harps' trip to Shamrock Rovers in the SSE Airtricity Premier Division next weekend.
All games in the Premier and First Divisions are being played next Sunday afternoon to avoid a clash with the Republic of Ireland v Netherlands international on Friday night.
Harps face another very difficult test away to a Rovers side who have already beaten Ollie Horgan's men at Finn Park this season.
And with Molloy now unavailable following his sending off against Crumlin on Saturday night, Harps' situation gets no better.
The Donegal side have now lost three on the bounce. And while going out of the FAI Cup will not be seen as a disaster, losing at home to non-league opposition will hurt.
Ollie Horgan said his players need to find a way out of their current problems as soon as possible.
“Last Tuesday week we got a great result in the Brandywell,” he pointed out.
“ But in the last ten or eleven days it seems to have turned on its head.
“We need to turn that back in the next week or so to try and get the points to stay in this division.”
Horgan said his Harps team could have no complaints after losing to a very impressive Crumlin side on Saturday night.
“We wish them well,” he said.
“ We’ll take our oil. Unfortunately we’ve taken a lot of that over the last ten days.
“We need to turn this and it’s not just going to turn by talking about it.
“We need to get back and work very hard to try and prepare for a hugely difficult game against a full-time outfit in Shamrock Rovers in Tallaght.”
Night to savour
For Crumlin manager, Martin Loughran, it was a night to savour at Finn Park.
“It's great for us to come up from Dublin and get a victory,” he said.
“It was our third time here. The first time, we got beaten 1-0 late on. The second time, we were hardly off the bus and we were three down.
“Tonight, we came here and said we'll have a bit of a go. We're near the end of our season - we've two games to go to win the league.”
The victory came just seven days after Crumlin's impressive 5-0 win over Letterkenny Rovers at the Aviva Stadium.
“It's been a great week for us,” Loughran said.
“Winning the FAI Intermediate Cup last Saturday and coming here tonight and turning Harps over in their own ground is excellent.”