Liam Williams: Wales will do what is best for him, says Pivac

Liam Williams in action for Wales against Italy in the 2015 Six Nations
Liam Williams made his Wales debut against Barbarians in 2012
Rugby World Cup
Hosts: England and Wales Dates: 18 September-31 October
Coverage: Live commentary on BBC Radio 5 live and sports extra, BBC Radio Wales and in Welsh on BBC Radio Cymru, plus live text commentary on every match on the BBC Sport website.

Scarlets coach Wayne Pivac is confident Wales will not push Liam Williams into action too early following Leigh Halfpenny's World Cup withdrawal.

Toulon's Halfpenny is out of the tournament with knee injury sustained in the 23-19 win against Italy.

Williams is favourite to start the tournament in his place, but has not played since foot surgery in June.

"They're going to do what's best for the team and the individual," said New Zealander Pivac.

"They're not going to push anyone too early because you don't get any rewards out of that.

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"I know they'll be doing a fantastic job with Liam and other players who are recovering from injuries."

Williams, 24, has made 23 Wales appearances split between wing and full back, but Pivac believes that he offers more when playing in the number 15 shirt.

"Wales are blessed with having two great full backs. But something always seems to happen around Liam when he plays there," he added.

"I'm looking forward to seeing him play because personally I think that he's a very, very good player."

Gareth Davies in action for Wales against Italy
Gareth Davies (right) has made three appearances for Wales

Pivac also believes that Gareth Davies has the qualities to take Rhys Webb's place in national coach Warren Gatland's team after the Ospreys scrum-half was also ruled out of the World Cup with a foot injury.

Davies has been a prolific scorer for Scarlets, claiming 10 touchdowns in the 2013-14 season to top the League's try-scoring table.

"He's very similar to Rhys Webb in his running game and his strength around the fringes," said Pivac.

"His history shows that he'll be up for it and he'll love the challenge and he won't let anyone down."

Wales' other back-three options

In Halfpenny, Wales have also lost a player who can play on the wing.

Newport Gwent Dragon Hallam Amos is similarly versatile, while versatile Matthew Morgan, of Bristol, and Bath's Rhys Priestland also have full-back experience.

In Hallam's case, Dragons backs coach Shaun Connor is confident the three-times capped player has the ability to rise to the tournament's demands

"He was probably the form left-winger in Wales last year but, looking at the future, we (Dragons) probably see him as a full-back," said Connor.

Wales' World Cup pool games
Sunday, 20 Sept, 14:30 BST: Wales v Uruguay, Millennium Stadium
Saturday, 26 Sept, 20:00 BST: England v Wales, Twickenham Stadium
Thursday, 1 Oct, 16:45 BST: Wales v Fiji, Millennium Stadium
Saturday, 10 Oct, 16:45 BST: Wales v Australia, Twickenham Stadium

"The back three these days are very interchangeable.

"It's a similar skill-set for both positions. Hallam has the capabilities to play both.

"He's bouncing that he's made the World Cup squad.

"He's one for the future but also he's one for now."

Wales' World Cup squad

Props: Tomas Francis (Exeter Chiefs), Paul James (Ospreys), Aaron Jarvis (Ospreys), Gethin Jenkins (Cardiff Blues), Samson Lee (Scarlets).

Hookers: Scott Baldwin (Ospreys), Ken Owens (Scarlets).

Locks: Jake Ball (Scarlets), Luke Charteris (Racing 92), Dominic Day (Bath), Bradley Davies (Wasps), Alun Wyn Jones (Ospreys).

Back-rows: Taulupe Faletau (Newport Gwent Dragons), James King (Ospreys), Dan Lydiate (Ospreys), Justin Tipuric (Ospreys), Sam Warburton (Cardiff Blues, capt).

Scrum-halves: Gareth Davies (Scarlets), Lloyd Williams (Cardiff Blues), Mike Phillips (Racing 92).

Fly-halves: Dan Biggar (Ospreys), Matthew Morgan (Bristol), Rhys Priestland (Bath).

Centres: Cory Allen (Cardiff Blues), Jamie Roberts (Harlequins), Scott Williams (Scarlets).

Wings: Hallam Amos (Newport Gwent Dragons), Alex Cuthbert (Cardiff Blues), George North (Northampton Saints), Eli Walker (Ospreys).

Full-back: Liam Williams (Scarlets).