World Cup fever has struck Bordeaux and Wales' defining day has arrived.

Ireland's comfortable victory over Romania was the warm-up act to the main event of Wales and Fiji's Pool C Sunday showdown.

That will be the view of the thousands of Welsh fans who have travelled here, maybe more in hope than expectation following a troubled year for Welsh rugby.

Wales have waited for their moment to arrive but it is finally time for the burning questions to be answered in the Bordeaux heat.

Is the world-class Taulupe Faletau match-fit? Will Wales' brutal training camps pay dividends? Has Warren Gatland returned to revitalise his adopted nation during a second stint in charge and, will his prediction of an "under the radar" side achieving "something special" in France materialise?

There are also lingering question marks about the opposition. Will they maintain the discipline and continue the set-piece improvement to go alongside their traditional Fijian flair?

Are Fiji favourites against a tier one nation like Wales after rising above them and Pool C rivals Australia in the world rankings?

There have also been accounts of Fiji's famous World Cup win over Wales in Nantes in 2007, the last time the two sides faced each other in France. Sixteen years ago, that was the final group game that saw Wales knocked out of the tournament.

This time the nations meet in a contest which could prove just as pivotal in a pool that also includes Australia, Georgia and Portugal.

It has been a long time since Wales have had such a critical World Cup opening game, where the result could define the rest of the tournament.

Gatland effect

Few would have predicted Gatland would be leading Wales into this World Cup campaign, especially after his first, 12-year stint as head coach ended after the 2019 campaign in Japan.

Wales know they are in safe hands as Gatland leads them to his fourth World Cup with this nation, and his fifth in all.

He sought to breed confidence into his squad by saying before the August warm-up Tests: "I am telling you this team will do something pretty special [in France]. I promise you now, we will surprise some people."

This could prove to be the New Zealander's biggest challenge after a difficult 12 months on and off the pitch.

Since Wales claimed a first victory over the Springboks in South Africa in July 2022, they have won just three of 13 Tests.

Wales have lost 26 games since 2019, the most defeats they've ever suffered in between World Cups.

Wayne Pivac left his role as head coach following an autumn campaign when Wales lost at home to Georgia, with Gatland then returning for a second spell in the job.

There was also a backdrop of major financial issues and contractual uncertainty throughout the Welsh professional game, which meant a potential players' strike dominated the build-up to Wales' Six Nations meeting with England in February.

A fifth-placed finish in that tournament was followed by the retirements of stalwarts Alun Wyn Jones and Justin Tipuric and injury to Six Nations skipper Ken Owens.

Since naming an expanded training squad more than three months ago, Gatland has had time and space to gradually piece things back together through punishing camps in Switzerland and Turkey, plus three World Cup warm-up games, although they culminated with a crushing defeat by world champions South Africa.

Underpinned by his World Cup record with Wales of two semi-final appearances and one quarter-final, Gatland knows the ropes and he is unquestionably relishing the task that lies ahead.

Youth and experience

There are 10 players in the 23-man squad to face Fiji who will be featuring in the World Cup for the first time. Five of them start, including flanker and captain Jac Morgan, who has evoked memories of the 2011 campaign in New Zealand, when Wales were captained by a 22-year-old Sam Warburton.

But you also cannot buy experience, and such a commodity could prove priceless for Wales in the heat of Sunday's battle.

It will be an occasion for cool heads and calm decision-making, so it should come as no surprise if the likes of George North, Dan Biggar and fit-again Faletau make significant contributions.

The three cap centurions boast 323 Wales international appearances between them, with North among an elite group to feature in four World Cups.

It is Biggar's swansong before he retires from international rugby, and number eight Faletau is back from an injury lay-off after not featuring in the World Cup warm-up games. They could hold the keys to victory.

Familiar foes

This will be a fifth successive World Cup at which these teams meet, with Wales having reeled off three successive wins since suffering that tournament-ending defeat by Fiji 16 years ago.

Wales triumphed 66-0 at the 2011 tournament and, though the two latest meetings were much closer contests, they found a way to cross the finishing line.

Fiji are fresh from humbling England at Twickenham, while Wales have won just two Tests this year, setting up an encounter that should be full of twists and turns.

The Fiji set-piece game has undoubtedly improved under head coach Simon Raiwalui, but it is still an ability to cut teams apart through razor-sharp running angles and raw physical power that makes them such a threat.

Players like Semi Radradra and Viliami Mata can cause havoc with ridiculous ease, and there is no doubt Wales could have their hands full defensively.

If Gatland's team get on the front foot early then they could boss the game tactically, yet that is far easier said than done against these dangerous opponents.

Heat of battle, painting Bordeaux red

Gatland has no doubt Wales are physically prepared for Bordeaux's blistering heat, so much so that he said he was not keen on the water breaks that have been introduced by World Rugby.

Gatland insisted he would not complain about the policy, but was merely pointing out he wants to back the conditioning of his side.

Wales are aiming to reap the benefits of punishing conditions at training camps that formed a central part of their tournament warm-up.

Temperatures have topped 30 degrees and despite a kick-off of 9pm local time, high humidity is still expected, although the Wales squad would have woken up to the sound of some rain on Sunday morning.

The contest is taking place in a city that already holds a special place in Welsh sporting folklore when it comes to the opening game of a major tournament.

This was the venue where Chris Coleman's Wales football team defeated Slovakia at Euro 2016, with goals from Gareth Bale and Hal Robson-Kanu beginning their historic run to the semi-finals.

Seven years on from that glorious summer, thousands have travelled to see if the nation's rugby counterparts will paint Bordeaux red once more. Wales' date with destiny awaits.

Head-to-head

Line-ups

Fiji: Droasese; Ravutaumada, Nayacalevu (capt), Radrada, Habosi; Tela, Lomani; Mawi, Matavesi, Tagi, Nasilasila, Ahiwaru Cirikidaveta, Tuisue, Tagitagivalu, Mata.

Replacements: Ikanivere, Ravai, Doge, Mayanavanua, Botia, Kuruvoli, Tuisova, Maqala.

Wales: L Williams; Rees-Zammit, North, Tompkins, Adams; Biggar, G Davies; G Thomas, Elias, Francis, Rowlands, Beard, Wainwright, Morgan (capt), Faletau.

Replacements: Dee, Domachowski, Lewis, D Jenkins, Reffell, T Williams, Costelow, Dyer.

Referee: Matthew Carley (England).