YOUNG Newport Gwent Dragons star Toby Faletau is set to miss the entire Six Nations campaign with an ankle injury.

The 20-year-old No 8 was named in Wales’ squad on Sunday.

But the Tongan-born back rower was hurt in the Dragons’ defeat to Glasgow in the Heineken Cup on the weekend.

It will be a devastating blow for the enormously talented young player.

Faletau was selected for Wales’ autumn series and was on the bench for the Fiji clash.

But he remains uncapped after he wasn’t used as a replacement in the disappointing 16-16 draw.

Faletau’s place in the Wales squad is to be taken by the Scarlets’ Rob McCusker.