The FMF Flying Fijians have the ability to upset Wales and Australia in the Rugby World Cup.

Australian Greg Mumm, who is the team's forwards coach says the forwards will be more competitive and they can beat the two top teams in their pool.

Mumm says Fijian players have got the size-up front and the forwards have a good height advantage. He says if Fiji can dominate possession, than they can upset Wales and can also match the Wallabies.