Andrew Trimble says Ulster must get back to winning ways when they welcome Exeter Chiefs to Kingspan Stadium on Saturday.
Ulster suffered a 28-13 defeat in their opening Champions Cup game against Bordeaux-Bègles after leading for most of the match.
Captain Trimble has called on his charges to produce a response against Exeter after director of rugby Les Kiss said they needed to take a "hard look at themselves" in the aftermath of a game they led until the 72nd minute.
"We're hurting from the last two weeks and we've got to produce a backlash on Saturday," Trimble told the Belfast Telegraph.
"We put ourselves in a position to win. We defended for such long periods but we hit our breaking point. If you're going to defend for as long as we had to, that's going to happen. Whenever we did get a chance to play rugby we didn't get the tempo high enough and we couldn't hold onto the ball.
"We just gave it straight back to them and then we're under pressure again. It's a very difficult result to come to terms with."
Ulster operations manager Bryn Cunningham said: "There'll be a bit of honesty this week. We'll look at ourselves and the areas of the game we slipped up with. They exposed us.
"It's a shame because we defended well for a long time. It'll be nice getting back to Belfast and hopefully put on a big performance."