Swansea beat Nottingham Forest 1-0 in the Championship this season, but haven’t won back-to-back games against them in all competitions since August 1953.

This is just the second FA Cup meeting between Swansea and Nottingham Forest, with the Swans winning the other 2-1 in January 1929.

Swansea have won five of their last seven home games in the FA Cup, though they did lose their last such match against Manchester City in March 2019.

Nottingham Forest have reached the FA Cup fifth round in just one of the last 15 campaigns, doing so in 2013-14 before being eliminated by Sheffield United.

Lyle Taylor has scored seven goals in his last five FA Cup appearances, netting the winner for Nottingham Forest in their third round match this season against Cardiff.

Arsenal

Arsenal boss Mikel Arteta speaking to BT Sport: "Really sad to be out of the competition. Disappointed to be out and the way we conceded.

"We had issues in the first half and unforced errors as a result of the high-press they do. In the second half we had two or three big chances but not enough.

"It was an even game. In the first half they won a lot of second balls. In the second half we added more quality. We became more dominant and created chances but it wasn't enough.

"We are looking in the market and see what we can do."

One game down, seven to go.

Sheffield United have won five of their last six meetings with Plymouth in all competitions.

Plymouth have won just two of their 51 FA Cup meetings with top-flight opponents (D11 L38) and are winless in 14 in the competition since beating West Brom in 1984.

Sheffield United have won 15 of their last 16 FA Cup ties against sides from a lower division, losing the other against non-league Barnet in January 2019.

Plymouth are looking to reach the FA Cup fifth round for the first time since 2006-07, though this is just their second appearance in the fourth round since then (also 2007-08).

Plymouth's Luke Jephcott has been involved in a goal in each round of the FA Cup so far this season, scoring in the first and second rounds and providing an assist in the third.

Sheffield United

The previous round saw Sheffield United get their first win of the season as they beat Bristol Rovers 3-2 and they followed that up with a 1-0 win against Newcastle in the Premier League.

The Blades are bottom of the table despite that win but boss Chris Wilder hopes another good result in the FA Cup can spark further positive results.

"There's still belief in the players," he said. "We keep going.

"We'll dust ourselves down, as we've done this week, and see if we can get a result and through to the next round.

"I see no downside to winning a game of football, whether it is an eight-versus-eight out there on the training pitch, a pre-season friendly at Stocksbridge, an FA Cup tie or a Premier League game."

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Brighton have won just one of their last five home meetings with Blackpool (D3 L1). This is the first ever meeting between the sides in a domestic cup competition.

Brighton have progressed from 13 of their last 15 FA Cup ties against sides from a lower division, although they were knocked out by a Championship side last season (Sheffield Wednesday).

Blackpool eliminated Premier League side West Bromwich Albion in the third round, having lost their previous 11 FA Cup ties against top-flight sides.

Solly March has scored in his last two FA Cup appearances, having netted in just one of his previous 12 in the competition.

Brighton & Hove Albion

Brighton boss Graham Potter wants to focus on their FA Cup fourth-round tie against Blackpool and not be distracted by their Premier League relegation battle.

They currently sit 17th in the league, five points clear of fellow strugglers Fulham, who they face on Wednesday.

"We've got to get into a mentality just to focus on the next match and try to win the next match," he said.

"As soon as you start looking too far ahead, you cause yourself a problem."

Swansea hand Conor Hourihane a debut for their FA Cup tie with Nottingham Forest.

The midfielder joined the Swans on loan from Aston Villa earlier this week.

Swansea XI: Woodman, Latibeaudiere, Bennett, Guehi, Roberts, Hourihane, Grimes, Manning, Dhanda, Routledge, Cullen.

Subs: Fulton, Lowe, Ayew, Bidwell, Naughton, Cooper, Garrick, Webb, Cabango.

Nottingham Forest boss Chris Hughton makes 10 changes to his side.

Joe Worrall is the only player to retain his pace in the starting XI.

Nottm Forest XI: Smith, Jenkinson, Worrall, Tobias Figueiredo, Bong, Bachirou, Mbe Soh, Lolley, Knockaert, Freeman, Taylor.

Subs: Christie, Grabban, Ameobi, Mighten, Cafu, Guerrero, Dawson, Blackett, Samba.

Sheffield United have gone with a strong XI to take on League One Plymouth. Blades boss Chris Wilder makes just two changes to the side that lost 3-1 to Spurs in the league last time out.

Forwards Billy Sharp and Rhian Brewster replace Olver Burne and David McGoldrick.

Plymouth Argyle are coming off a 2-1 win over Sunderland. They make one change as Liverpool loanee Adam Lewis is replaced by winger Panutche Camara.

I have some friends joining me on here now, yay!

If there's any typos, you can blame one of Phil Dawkes, Tom Rostance or Gary Rose. Shamoon Hafez is going to help us out for a bit too.

I'm just grabbing a quick break but we'll all be back for the 15:00 GMT games.

Southampton

Southampton boss Ralph Hasenhuttl speaking to BT Sport: "We had in the first half more punch and more power.

"In the second half it's normal they have a lift. We must make the second goal. We made one or two chances - Shane Long should have got a penalty.

"We had early ball wins, but our last decision-making was not always the best. In general our work without the ball was good.

"It was a good team performance today."

It may be a place in round five at stake but both Championship sides make a raft of changes after tough games in midweek.

Millwall make eight changes in all, with only Ryan Leonard, Jake Cooper and Ben Thompson keeping their places. Ken Zohore will lead the line while highly-rated Jed Wallace isn't even on the nine-man bench,

Millwall: Fielding, Leonard, Pearce, Cooper, Romeo, Parrott, Thompson, Ferguson, Bradshaw, Bennett, Zohore. Subs: Hutchinson, Smith, Malone, Woods, Bodvarsson, McNamara, Skalak, Burey, Bialkowski.

Bristol City make six changes as Nahki Wells comes in up front.

Bristol City: O'Leary, Mariappa, Kalas, Moore, Rowe, Semenyo, Vyner, Bakinson, Palmer, Diedhiou, Wells. Subs: Bentley, Hunt, Nagy, Martin, Adelakun, Bell, Towler, Owura Edwards, Massengo. Referee: Tony Harrington (Cleveland)

BBC Radio 5 Live

This game is on the radio at 15:00 GMT. Click the icon at the top of this page to listen. There will also be updates from the other games.

Six changes for Brighton from the team that beat Leeds United in the Premier League.

This looks like a chance for a couple of fringe players to impress boss Graham Potter. Andi Zeqiri starts up top, the Switzerland forward is playing just his fourth game for the Seagulls.

Blackpool have been forced to make seven changes from the side that knocked out Premier League West Brom on penalties in the last round.

Covid-19 in the Tangerines' camp has meant that five of those who started that game aren't even in the squad.

Highly-rated Everton loanee Ellis Simms is on the bench. He could make his debut today.

Doncaster Rovers are in excellent form at the moment having won seven of their past eight games.

They have also conceded just one goal so far in 2021, and captain Tom Anderson says he and his team-mates are relishing the chance to test themselves against Premier League opposition.

"It's a massive game for us and a great opportunity to enjoy and show what we can do against a Premier League side," he said.

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David Moyes makes seven changes from the West Ham side that defeated West Brom on Tuesday, but it's still a team packed with Premier League experience.

In come Ryan Fredericks, Fabian Balbuena, Issa Diop, Ben Johnson, Mark Noble, Pablo Fornals and Andriy Yarmolenko with Michail Antonio and Declan Rice among the substitutes if needed.

West Ham: Fabianski, Fredericks, Balbuena, Diop, Johnson, Soucek, Noble, Fornals, Lanzini, Benrahma, Yarmolenko.

Substitutes: Trott, Coufal, Dawson, Ogbonna, Baptiste, Cresswell, Rice, Antonio, Afolawn.

Doncaster Rovers, fourth in League One and with seven wins in their past eight matches in all competitions, make three changes from the starting 11 that began the 1-0 win over Rochdale on Tuesday.

In come Reece James, Joe Wright and Jason Lokilo.

Doncaster Rovers: Balcombe, Halliday, Anderson, Butler, John, Smith, James, Taylor, Wright, Lokilo, Okenabirhie.

Substitutes: Richards, Simoes, Jones, Amos, Williams, Ravenhill, Blythe.

Alan Hutton
Former Aston Villa defender on BBC Radio 5 Live

Southampton were at it from minute one. They were setting traps, trying to create problems and had the better chances. They thoroughly deserved it.

It's a disappointing game from Arsenal, I thought they were really poor.

Barnsley make three changes from the side that lost 1-0 to Watford last time out. This includes a change of goalkeeper, with Brad Collins replacing Jack Walton.

Conor Chaplin and Michael Sollbauer drop to the bench, with Toby Sibbick and Dominik Frieser coming into the starting XI.

Norwich make five changes to their side. Lukas Rupp and Alex Tettey come in to central midfield, with Onel Hernandez, Kieran Dowell and Przemyslaw Placheta in front of the them.

Emil Buendia and Todd Cantwell and two of the players to make way.

Tim Krul makes his 100th Norwich appearance in goal.