World Rugby has brought in a tougher approach to dangerous tackling this year, with zero tolerance for reckless or accidental tackles that make contact with a players head.
Fiji coach Gareth Baber said Fijian players have grown up tackling a certain way and it can take time to make adjustments.
He said yellow cards have proved costly for them in recent World Series tournaments and it's something they've worked hard to address for this weekend's event in Las Vegas.
"When you get in the heat of battle obviously you fall back on your habit," he said.