Sports doctor explains World Cup injuries

The Rugby World Cup might have only just kicked off, but already there have been some serious injuries.

Last week, Wales had to replace Hallam Amos and Scott Williams in the squad, after they were injured playing against England.

Scotland, England and Australia have all had top players ruled out of the World Cup after they were hurt.

Top sports doctor Dr Rick Seah tells us why there are so many injuries in the Rugby World Cup.