A four-try haul from Sua Fa'alogo helped Samoa to a record-breaking 78-4 victory over France to open their World Cup account in style at CommBank Stadium on Friday.

The Melbourne fullback made a big impact off the bench after replacing an injured Deine Mariner early in the match, running for 237 metres to go with his four tries.

After disappointing results in their 2026 campaigns, star duo Jarome Luai and Stephen Crichton also enjoyed a night out for Samoa, with Luai delivering four line breaks and two try assists and Crichton kicking 10 from 13 conversions.

After a strong, physical start Samoa struck first in the third minute after some slick hands to the left and Mariner went over untouched in the corner.

There were some worrying signs for France early with five-eighth Cesar Rouge and winger Leo Darrelatour both leaving the field for head injury assessments and Samoa running in another two tries through Benaiah Ioelu and Test debutant Jermaine McEwen to lead 18-0 eight minutes into the match.

Mariner left the field with a hamstring injury in the 10th minute but it did not hinder the strike attack on the left edge with replacement winger Fa'alogo crossing in the corner and setting up Hamiso Tabuai-Fidow on the inside to give Samoa a 28-0 advantage.

France got on the board in the 25th minute when skipper Benjamin Garcia looked to the short side and a remarkable catch and put down from Guillermo Aispuro-Bichet delivered his side their opening tournament try.

The French wrestled their way back into the contest but couldn't capitalise on their opportunities and Samoa went further ahead with Luai throwing a cut out pass for an unmarked Fa'alogo who crossed in the corner to take his side to the sheds with a 34-4 lead.

Samoa picked up where they left off after the break when Brian To'o laid a huge shot to force an error out of Arthur Mourgue and Crichton picked up the loose ball and raced his way over the line. Chrichton converted his own try from the sideline to stretch the lead 40-4.

Samoa continued to dominate across the park and after France turned them away for several sets, Shawn Blore crashed over for the side's eighth try off a simple catch and pass play.

Fa'alogo continued his superb night out, crossing the line twice in four minutes to notch four tries for the match and crack a 50-point lead for Samoa.

Luai's footwork continued to haunt the French late in the match and some slick hands on the inside from Ioelu set up Chanel Harris-Tavita to crash over from close range.

The winning margin was Samoa's biggest at a World Cup and 78 is their highest score at a World Cup.