Leinster full-back Rob Kearney knows that his side's Pro12 hopes for this season are hanging by a thread.
Having bowed out of the Champions Cup last Sunday after their semi-final loss to Toulon, Leinster's attention is now fully on making it back into the Pro12 playoff spots.
The champions are currently eight points behind the fourth-placed Ospreys with only three games to go, having only won nine of their 19 matches so far this season.
Victory over Friday's opponents Ulster is therefore essential, and Kearney knows it.
"We're backed into such a corner now that there's literally no other option," Kearney told reporters.
"We have to come out, we have to fight really strongly, play well. I think maybe in some regards this week, more so than last week, is a huge character test for us and we need everybody to stand up.
"We lose, we're gone. It's 100 percent survival. That's exciting sometimes too. Ideally you'd like to be in the top four, but we're not yet. It's out of our hands.
"If we can win this week there will be a slip-up somewhere along the way over the next three weeks with one of the teams in the top four. We just have to hope that slip-up favours us."