Newport Gwent Dragons flanker Dan Lydiate has admitted that his side could suffer a comprehensive defeat to the Scarlets on Saturday.
The two sides will take each other on in the opening game of the double-header derby day fixtures at the Millennium Stadium in Cardiff.
"If we don't turn up on the weekend we could be looking at 50 points again," Lydiate told the BBC Sport Wales programme. "Our performances have not been good enough.
"We had a massive loss against the Ospreys. Make no bones about it - it wasn't good enough. On a personal note I was just happy to get back in that environment and playing again, getting 40 minutes under my belt.
"But as a team we didn't perform. The Scarlets have got a really good team. So if we don't turn up on the weekend we could be looking at 50 points again. So we have to make sure our heads are on again."
In the other game on Saturday, Cardiff Blues will face the Ospreys.
