Scrum-half Rhys Webb has been warned he faces a battle to regain his number nine jersey after being recalled to the Wales Six Nations squad.

Webb has been named in Wayne Pivac's 38-man squad after becoming eligible for Wales again.

The 31-year-old last played for Wales against South Africa in December 2017 and Pivac says he faces competition from Gareth Davies and Tomos Williams.

"He needs to come in and prove himself again," said Pivac.

Webb had been ineligible for Wales since the WRU brought in a selection policy in October 2017 that meant players would not be picked if they had won fewer than 60 caps and opted to move away from Wales.

The British and Irish Lions scrum-half had announced he was signing for Toulon from Ospreys and missed the 2019 World Cup in Japan.

Webb is eligible to play for Wales in the 2020 Six Nations after announcing he will return to Ospreys from Toulon who agreed to Webb's early release from his contract for family reasons.

The Welsh Rugby Union confirmed Webb was available for immediate selection after being given a "six-month dispensation".

This had caused concern from the French side with Toulon owner Bernard Lemairtre suggesting Webb might have played the last game for the club.

Pivac is concerned with how Webb performs with Wales as he bids to try and oust Williams and Davies as well as helping his scrum-half rivals.

"We know what he's done in the past," said Pivac.

"He's been a British and Irish Lion, is a very capable player, has a lot of experience.

"Bringing him back in is an opportunity for him but it's not an automatic selection by any means. He knows that.

"What it does do is that it is great for Tomos Williams - another experienced player to learn from.

"He is still developing his game. Rhys can play a part and create even more competition than there was."

Pivac also outlined why he selected Owen Williams as one of his thee fly-halves with the Gloucester 10 chosen alongside Dan Biggar and Jarrod Evans.

Williams provides an option at centre compared to Dragons half-back Sam Davies who is more a specialist 10.

"We know he can do both play and he has done it against the All Blacks at 12," said Pivac.

"We have young Jarrod (Evans) there who is battling a bit of a head knock, so Owen is there to cover 10 and if we need to 12."