Warren Gatland wants Wales to show no fear and embrace the challenge when they tackle “world-class” Ireland in Dublin on Saturday.

Wales have been largely written off – they are a 14-1 chance with some bookmakers – on the back of successive defeats against Scotland and England, while their last Six Nations win in Ireland was 12 years ago.

Ireland have lost just twice in their last 40 home Tests, need one more victory to equal England’s Six Nations record of 11 successive wins and are on a seemingly unstoppable march towards achieving historic back-to-back Grand Slams.

“We know how good a side they are,” Wales head coach Gatland said. “They are a settled team. They are world-class.

“We have got to be smart and not allow them to play the game on their terms. That is when they are incredibly dangerous.

“Just one moment from them can change the momentum of the game. They have got some key individuals, but we’ve got to try and put them under pressure to unsettle them.

“There has been a lot said about us being underdogs, but that is not a motivation for us. The motivation is the pressure we are putting on ourselves to get better from game one and two.

“We have spoken all week about having no fear.

“We have reflected, and (Wales captain) Dafydd Jenkins has spoken about it, we probably went into that first game with a little bit too much respect for Scotland in that first half, and that was the message at half-time. I think we saw an improvement at Twickenham.

“It is going to be a huge challenge for us but you have got to embrace that, you have got to be excited about that.

“I have spoken to the players about stepping up in big moments and being the one who wants to be part of a big moment and not having any fear about that, not going into your shell.”

Gatland has made a solitary change from the England loss, with fit-again Sam Costelow returning at fly-half instead of Ioan Lloyd.

There are further opportunities for newcomers Cameron Winnett and Alex Mann, while Cardiff back-row forward Mackenzie Martin is set for his Test debut off the bench.

The 20-year-old has played only nine games of professional rugby, and he will become the 1,200th Wales men’s senior international if he features against Ireland.

Gatland added: “We feel we are building for the future, and we have got some really talented young players at the moment who need time.

“I think the players are aware we have a huge amount of growth in us and where we can be in the next 12 months or so.

“We can’t hide away from that fact of how important it is to win (in) international rugby, because that is the expectation.

“When you put that jersey on, everyone expects you to go out there to perform and win.”

And Wales skipper Jenkins said: “We just need to go out there, leave everything out there and see what can happen.

“If we didn’t think that (Wales can win) there would be no point in going there in the first place. We have full confidence we can win and do a job, although it is going to be tough.”

Cameron Winnett and Alex Mann were junior school pupils when Wales last beat England in a Six Nations game at Twickenham.

But 12 years on from that Triple Crown-clinching victory, both Cardiff prospects will feature in one of rugby union’s most fierce rivalries after being selected to start against England on Saturday.

Their sporting careers have a symmetrical appearance, as both were promising footballers – Mann a centre-back in Cardiff’s academy – and they made debuts together for club and country.

They first played for Cardiff across the A316 from Twickenham against Harlequins as teenagers, while Winnett started the 27-26 Six Nations home loss to Scotland last weekend and Mann went on during Wales’ remarkable fightback from 27 points adrift, scoring his team’s fourth try.

Full-back Winnett, 21, was born on January 7, 2003 – flanker Mann on January 6 the previous year – and they look likely to be part of Wales squads heading towards World Cup 2027 in Australia and beyond.

Winnett describes Mann as being “like a big brother” and there is a noticeable chemistry between them, partly forged by their time together for Wales Under-20s, a team that Mann captained.

Reflecting on his Wales debut, Winnett said: “It was amazing, and everything I had worked for since I was a little kid with a dream.

“I was thinking about all the sacrifices my parents made, taking me to sessions, and all the coaches who had helped me get to that point.”

Mann added: “That is what we work for, really. All those days that are dark days or good days.

“Standing there was a bit surreal, I was just soaking it all in, really. It was probably the best day in the world.”

Mann’s football connection extended to events last Saturday, with his friend Isaak Davies scoring the winning goal for Belgian Pro League club Kortrijk against Charleroi at roughly the same time Mann appeared off the bench for his Wales debut.

Davies moved on loan from Cardiff to Kortrijk last summer, and Mann added: “He was the first I FaceTimed afterwards because he was in Belgium playing and he scored, funnily enough the time I came on, so it was a proud day for us both.”

“I started with Cwmbach, got scouted, and then went straight into the (Cardiff City) academy. The professional set-up, I think that has helped me a lot from a young age.

“Then I started playing rugby again in school, and I knew straightaway that was for me. It just came naturally, the way I am.”

Winnett played soccer as a junior at Rhondda club Cambrian and Clydach Vale, where Terry Venables was chairman and president. Venables’ mother Myrtle hailed from Clydach Vale.

“It had always been rugby and football,” Winnett said. “I played for my local team Porth growing up, and then Cambrian, where I had two seasons.

“After those two seasons, I thought I couldn’t keep on playing two games of soccer and rugby on the same day, so I decided to play rugby.”

Attention now turns to Twickenham as Wales target ending a run of seven successive defeats since toppling England there during the 2015 World Cup.

Mann said: “The senior boys in the group have helped us loads, settling us in. Anything I want to ask, they are more than happy to help.

“I am trying to be like a sponge, really, trying to listen to it all and take it all in.”