Where do you see tonight's game being won or lost? Will either of these sides be in Russia next summer?

Both?

Get in touch on #bbcfootball or text us on 81111

He might be desperate for a World Cup but Chris Coleman is reluctant to declare tonight's encounter in Dublin a "must-win" match for his team.

"People will look at this and say it's do or die but I don't see that," he said.

"All I see is a huge challenge, a great game for us. We've always wanted to be involved in games like this, when the pressure is on for all the right reasons, which means we're competing at the right end as opposed to halfway into it and competing for nothing, competing for pride. That's not the case."

Wales manager Chris Coleman has warned his players not to get caught up in a 'derby' atmosphere tonight.

His side fell to a stoppage-time defeat to England during the Euros and Coleman wants his side to learn from that loss.

"We can't miss the game - we did that I think against England," he said.

Image source, Getty Images

"We were disappointed after the England game because it was a British derby* and there was so much surrounding it, and we got sucked into that."    

*Yes, I know that the Republic of Ireland is not in Britain. But Chris Coleman, or I, didn't actually say that it was. 

BBC Radio 5 live

Image source, Getty Images

You know the score...

Follow the link at the top of this page of turn on your radio to listen to BBC Radio 5 live's coverage of tonight's game.

Gareth Bale has bagged 17 goals in his last 23 qualifiers for the Dragons and is now just two goals away from levelling with Ian Rush as Wales’ all-time top goalscorer (Ian Rush, 28 goals).  

Rep of Ireland : Randolph, Coleman, Keogh, O'Shea, Ward, McCarthy, Walters, Whelan, Hendrick, McClean, Long. Subs: Westwood, McGeady, Kevin Doyle, Christie, Egan, Hourihane, Meyler, Hayes, O'Dowda, Pearce, Colin Doyle.

Wales : Hennessey, Gunter, Chester, Williams, Davies, Taylor, Ledley, Ramsey, Allen, Bale, Robson-Kanu. Subs: Fon Williams, MacDonald, Edwards, Wilson, Richards, Vokes, Collins, Walsh, Bradshaw, Woodburn, Ward.

Referee : Nicola Rizzoli (Italy)

Image source, Getty Images

Martin O'Neill wants his players to replicate their famous win over Italy last summer when they take to the field tonight.

Robbie Brady headed the winner in Lille to send O'Neill's side into the last 16.

O'Neill said: "It's not a distant memory. Some of the players who performed that evening can call upon the experience again and go for it.

"I think we will have to produce a performance like that against Wales. I think the players are ready for it."

Image source, Reuters

Some news from the England camp this afternoon which you may have missed - Middlesbrough defender Ben Gibson has been called up for the first time.

The 24-year-old will join up with Gareth Southgate's squad for Sunday's 2018 World Cup qualifier against Lithuania at Wembley.

The centre-back has been drafted in following an injury to Chris Smalling.

App users may need to select 'view more' to see this post.

After an impeccable minute's silence in Wiesbaden to mark the London terror attack this week, we are under way. 

Juliette Ferrington
BBC Radio 5 live in Dublin

Image source, .

It couldn't get any redder in Dublin City centre. The place is bouncing as the Welsh look to unleash the dragon on the Boys in Green tonight.

You can't get a ticket for love nor money for this game - it sold out in record time such is its importance in this World Cup qualifying group.

Republic of Ireland have four points on Wales, who can't afford to drop further behind Martin O'Neill's men if they want to achieve their hopes of World Cup qualification.

No new injury concerns for Chris Coleman ahead of this crucial night as thousands of Welsh fans take advantage of the sunshine and Guinness before heading down to the Aviva Stadium.

Image source, .

Not a must-win game for Wales?Serbia have just wrapped up a win in Georgia which puts them top of Group D as we stand.

Image source, bbc

Image source, Rex Features

England Under-21s' preparation for this summer's European Championships continues tonight when they visit Germany (19:00 GMT). 

New head coach Aidy Boothroyd then takes his side to Denmark on Monday.

England kick-off their Euro finals campaign against holders Sweden on 16 June, with Slovakia and hosts Poland also in their group.

Ian Brown
BBC football commentator

They are not keen on the phrase "must win game" and the Welsh team are right not to see it in such stark terms.

A point would keep the pot boiling. But - here's the key point - Wales dare not lose. Defeat would leave them seven points adrift of Ireland with the easier home games in Cardiff already played.

So Wales need to take advantage of Irish injuries and suspensions. Three of the back 4 who played in the win in Austria are unavailable to Martin O'Neill while Wales should be at full strength for the first time since that famous Euro might in Lille.

There's full commentary on BBC Radio 5live Sport from 19:00 GMT.

Wales football fans have faced travel disruption today, as transport unions called strikes.

A one-day bus strike is taking place and some trains have also been cancelled - leaving one group of 20 fans stuck in Rosslare.

Pre-booked tickets will be refunded but there are no alternative bus or rail services running.

Pub it is. 

Image source, Getty Images

Jonathan Walters has scored six goals in his last seven home games for the Republic of Ireland, including four of their last six goals in qualifiers at the Aviva.

The main man tonight?

Dafydd Pritchard
BBC Sport Wales at the Aviva Stadium

Republic of Ireland manager Martin O’Neill makes five changes from November’s 1-0 win in Austria, with injuries and suspension accounting for the absence of Shane Duffy, Ciaran Clark, Robbie Brady, Wes Hoolahan and Harry Arter. In come Richard Keogh, John O’Shea, Stephen Ward, James McCarthy and Shane Long.

Wales boss Chris Coleman makes one change from the 1-1 draw with Serbia in November, with Ben Davies returning from injury to take his place on the left-hand side of the three-man defence. With Wales reverting to their favoured wing-backs system, striker Sam Vokes drops to the bench.

Republic of Ireland XI: Randolph; Coleman, Keogh, O'Shea, Ward; McCarthy, Whelan; Walters, Hendrick, McClean; Long

Wales XI: Hennessey; Gunter, Chester, Williams, Davies, Taylor; Allen, Ledley; Bale, Ramsey; Robson-Kanu.