France scrum-half Antoine Dupont may have broken his jaw in a high tackle that forced him off the pitch in the 96-0 World Cup thrashing of Namibia on Thursday, coach Fabien Galthie said.

The influential Dupont, who had earlier scored a try, left the pitch in Marseille in the 46th minute nursing his right cheekbone after Johan Deysel made a badly-timed head-on-head tackle and was sent off.

"We have a suspected cracked or fractured jaw. We will wait for scans before moving forward," said Galthie.