Ospreys prop Adam Jones has called for drastic improvement from his side ahead of Sunday's Heineken Cup tie with Leicester at the Liberty Stadium.
The Welsh region struggled to an unconvincing 16-15 PRO12 victory over Italian strugglers Zebre last weekend.
The Wales fornt-rower has told his team-mates that they cannot put in a similar performance against the Tigers who have won the Heineken Cup on two occasions.
"It's obviously a big step up against Leicester," he told the South Wales Evening Post.
"As a pack, we've got to raise our game.
"We've been pretty good recently. We were good against Toulouse and we know when we're up there we can match anyone.
"We're going to get stuffed if we turn up like we did on Friday."
There's plenty at stake in the upcoming clash with Pool two leaders Leicester, who are five points ahead of the Ospreys who are third on the table.
In recent years a tempestuous rivalry has developed between the Ospreys and Leicester with several fiery clashes in European and Anglo-Welsh competitions taking place.
"I don't really know how it came about," added Jones.
'We haven't been a region that long but I think it was when we played them in 2005 - it was one hell of a game (Leicester won 17-15 at the Liberty).
"I think (Dan) Hipkiss scored in the last minute.
"There's no love lost. We know what a good side they are. We were disappointed with our last ten minutes when we lost up at Welford Road this season.
"You've got to raise your game. It's one hell of a side, with a hell of a forward pack.
"Anyone who can bring on (Argentina prop Marcos) Ayerza and Castro (Italy prop Martin Castrogiovanni) is going to be a challenge."