Keiron Cunningham praised the ruthlessness of South Sydney Rabbitohs after they beat St Helens by a record margin in the World Club Challenge.
The Saints head coach watched on as his team were overpowered by the National Rugby League champions 39-0.
The Australian side ran in seven tries with Saints unable to score a point.
"They're a great side, they took every single opportunity and scored a try. I feel for my players - they're dejected," Cunningham said.
"Every opportunity we had, something happened where it just didn't quite go our away.
"You make your own luck in rugby league but unfortunately we couldn't make our own luck today," he added to BBC Radio Merseyside.
Saints, who had started the new Super League season with two wins, found themselves behind in the first two minutes and struggled to recover.
Mark Percival had a couple of rare opportunities on the Souths line for the hosts, but the Super League champions struggled to break down a well-structured Rabbitohs defence.
"I'm deeply disappointed, but that is rugby league," Cunningham said.
"The higher you go up the tree the tougher the competition is, the more clinical you've got to be, and unfortunately we left our worst performance of the season until tonight.
"They know they're better than that and can perform better than that and I genuinely feel for them."