The Sydney Roosters have confirmed their NRL premiership credentials with a convincing 32-12 win over fellow top-four contenders Penrith in Sydney.
Following two losses, the reigning premiers led from start to finish and rarely looked troubled.
For the Panthers, who had a short turnaround from a thrilling one-point win over Brisbane on Monday night, the emphatic defeat will nonetheless raise doubts about their bona fides against top sides.
This season they have defeated just two sides who went into round 19 inside the top eight and have a tough run into the finals.
Sonny Bill Williams, who did not drink or eat during the day due to his observance of Ramadan, put in a solid 80-minute performance.
The Panthers lacked direction, missing playmakers Peter Wallace and Tyrone Peachey, while halfback Jamie Soward had a poor match, particularly with the boot.
The Roosters are now fifth with the Panthers third, one win ahead of the boys from Bondi.