Brighton forward Evan Ferguson has completed a loan move to West Ham United.
The 20-year-old Republic of Ireland international will join the Hammers until the end of the season, having made 15 appearances for Albion this campaign, largely from the bench.
What do you think of this deal, West Ham fans? Have your say
And what about you, Brighton supporters? Let us know
Image source, Getty ImagesBrighton's new signing Stefanos Tzimas, speaking to club media about his move from Nuremberg: "It's an honour to be here. Playing in the Premier League was my childhood dream and I'm very happy that one big dream has come true.
"I'm really excited and I can't wait.
"The main reason to sign for Brighton was about development. This is the best club for young players to develop. This is also one of the best clubs in the best league in the world."
On returning to Nuremberg for the rest of the season: "The most important thing for me is my development so for these next six months I will work a lot to be ready for here."
Norwich City have signed Northern Ireland international defender Ruairi McConville from Brighton for an undisclosed fee.
The 19-year-old's only senior appearance for the Seagulls came as a substitute in their 4-0 FA Cup win at Carrow Road on 11 January.
Follow live transfer updates and see all of Monday's completed deals
Image source, Getty ImagesBrighton boss Fabian Hurzeler, speaking about new signing Stefanos Tzimas: "Stefanos is an exceptional young talent, an out-and-out centre-forward with a natural ability to score goals, and we are absolutely delighted to have signed him.
"He will join up with us in the summer, ahead of next season, but we are really looking forward to working with him and feel he has a very exciting future ahead."
Technical director David Weir added: "He will spend the second half of the season with Nuremberg, who have provided him with an excellent opportunity this season, to continue his development in the Bundesliga 2.
"We will keep a close eye on his progress and wish him the very best for the second half of the season with Nuremberg."
Follow live transfer updates and see all of Monday's completed deals
Brighton have confirmed the signing of Greek forward Stefanos Tzimas from German second-tier club Nuremberg.
The 19-year-old will remain with Nuremberg on loan for the remainder of this season, before linking up with the Seagulls in the summer.
The transfer fee is officially undisclosed but BBC Sport's Simon Stone reports Brighton have completed a 25m euro (£20.79m) deal for the Greece Under-21 international.
What do you think of the deal, Brighton fans? Let us know
Simon Stone
Chief football news reporter
Image source, Getty ImagesBrighton are on the verge of completing a 25m euro (£20.79) deal for Greece Under-21 international Stefanos Tzimas.
The 19-year-old has been one of the most sought-after young players in Europe this transfer window and Brighton believe they have landed a major coup by getting him.
The plan is for Tzimas to stay with German second-tier club Nuremberg for the remainder of the season before moving to the Amex in the summer.
He is already on loan in Germany from Greek club PAOK.
Millwall have signed Brighton winger Benicio Baker-Boaitey for an undisclosed fee.
The 21-year-old is the sixth new player to move to The Den during the winter transfer window and has signed what the club describes as a "long-term contract".
Brighton technical director David Weir said: "Benicio has progressed through the academy and it was great to see him make a number of appearances for the first team in the second half of last season.
"This is a good move for all parties, and we wish the best of luck for the future."
Follow live transfer updates and see all of Monday's completed deals
We asked you what would ensure you are satisfied this deadline day.
Here are some of your comments:
Dom: We're desperately short of full-backs as was exposed on Saturday. Two full-backs on the left and right should be the minimum requirement. We have 13 wingers, including those out on loan, but have only had two full-backs in the squad for six years now. The recruitment has been top heavy.
Joe: I would like to see some of the unproven signings go out on loan like Brajan Gruder, Mats Wieffer and Matt O'Riley, instead of letting young potential superstars go who have already shown they are Premier League ready. But it looks like it's too late for this, and it has already backfired. That has been shown by recent tinkering by Fabian Hurzeler and the poor results.
Tim: Why we're letting Evan Ferguson go out on loan I do not know. Also, the defence needs work. Two central defenders that can win aerial battles at the back and at corners would be an improvement.
David: With Julio Enciso and Ferguson out on loan and Joao Pedro seemingly more interested in advertising himself to "larger clubs" than playing for his paymasters, a striker prepared to shoot is essential. Also, with Tariq Lamptey leaving, cover at right-back should be a priority.
Flo: Why can't we keep Ferguson? It's not like we are awash with strikers!
It's the last day of the winter transfer window and Premier League clubs have until 23:00 GMT to complete their business.
We'll bring you all the news, views, twists and turns as the clock ticks down to deadline.
Brighton are closing in on a deal for PAOK's Greece Under-21 forward Stefanos Tzimas, who is on loan at Nurnberg. (Sky Sports, external)
Meanwhile, the Seagulls have had an £8m bid for 18-year-old winger Tommy Watson turned down by Sunderland, who are expecting more offers for their England youth international. (Guardian, external)
Want more transfer stories? Read Monday's full deadline day gossip column
Image source, Getty ImagesBrighton left-back Valentin Barco has joined Strasbourg on loan until the end of the season.
The 20-year-old joined Albion last January from Boca Juniors and made seven appearances for the club before being loaned to Sevilla in the summer.
However, after featuring just eight teams in the first half of the season he was recalled by the Seagulls.
Head coach Fabian Hurzeler said: "It is important for Valentin to play, and this gives him that chance to get games.
"He had a frustrating time with Sevilla, but this gives him a fresh start and a new opportunity. We wish him well for the second half of the season."
Let's be realistic.
Instead of setting sights high only for dreams to get dashed, we want to know what the minimum requirement is for Brighton on deadline day.
Be as specific as possible and tell us what will ensure you are satisfied come 23:00 GMT on Monday.
Image source, Getty ImagesWe asked for your thoughts after Saturday's Premier League game between Nottingham Forest and Brighton.
Here are some of your comments:
Forest fans
James: What a win. Seven goals, a hat-trick for Wood and a hat-trick of assists for Elanga. Everyone gave 100% and it was the best response to the defeat last week. Nuno has been a breath of fresh air for this club after Steve Cooper. Long may it continue.
Steve: Bouncing back from a 5-0 drubbing is only bettered by the quality throughout this team. We look quality, even after the substitutes. In Matz Sels, we have one of the best keepers in the league.
Fosi: Superb display. The whole XI were totally committed. I was unable to pick out one player above the rest! Please repeat this performance over and over! Superb.
Joshua: We dominated the whole game! An amazing performance, well done. If we keep this up, we are going to give Liverpool a difficult time.
Mark: That's the way to answer a heavy defeat. Real Madrid, look out!
Brighton fans
Robert: An embarrassing performance from start to finish. The lack of fight from these players was the worst thing for me. Hurzeler is getting found out tactically at this level. He is more obsessed with playing a system rather than getting the best out of the players he has to win games. We have more chance of relegation than European football based on this performance.
Keven: Clueless, no vision and slow, telegraphed play. Too many players were too close to each other, leaving plenty of space for Forest to exploit. The manager is struggling to find a style of play that opens up teams. Maybe this is a bridge too far for him at this stage of his career? Is it time for a change?
Fran: The manager got it all wrong. You can't keep changing the team like that. Defensively, we were a shambles. We need to play the same side, barring injuries, every week - just like other teams do. Unless we learn from this, our season is over - if it isn't already.
Ed: Absolutely pathetic. It's like we don't want to win! Why did we start one midfielder against a team sitting third in the league? Shambles.
Watch highlights and analysis from Saturday's six Premier League fixtures.
If you missed Match of the Day, you can catch up now on BBC iPlayer.
Listen back to full match commentaries on BBC Sounds:
Image source, Getty ImagesBrighton captain Lewis Dunk has been speaking to TNT Sports about the heavy defeat: "Everything went wrong, it was embarrassing. We let ourselves down. We let the travelling fans down. We let the fans at home down. We have to take it on ourselves. It was us out there that performed like that. We have to look at ourselves in the mirror and bounce back next week.
"I don't think we played with enough intensity or wanted it enough. It's not nice to say as a football player, but we weren't good enough today. As a whole team, we didn't deserve [anything]. It could have been even more [goals].
"We knew that we were coming here for a tough game, they are flying in the league and it is always a tough place to come. That tough? Probably not - and that is on ourselves. We have to work hard now and make sure we don't let ourselves or the fans down like that again.
"It is doing it on the training field, working hard every day and wanting it every day. It starts on the training pitch. Three games ago, we were on top of the world again weren't we, after two wins in a row. Now we are rock bottom again.
"This season has been a rollercoaster. The manager speaks about consistency all the time and that is a prime example of not showing any. We have to work at it. There is a lot of work to do to get to where we want to get to.
"There wasn't much to say [after the game]. We let ourselves down, let the fans down, let him [Fabian Hurzeler] down. There was nothing to say."
Hear more from Dunk talking to BBC Radio Sussex on BBC Sounds
Image source, Getty ImagesBrighton boss Fabian Hurzeler has been speaking to BBC Match of the Day about the defeat: "A bad performance, a bad result, I'm very disappointed. I want to see a reaction from the team, but we win together and we lose together. It is also a test, for the individual characters and for the group, to see how we deal with this. Games like this are bad, but maybe it is a signal for us to show a reaction.
"We said we wanted to play with courage. We wanted to play offensively and, in the end, you could say it was a mistake. In the end, we were not good enough.
"You need to have a balance between defence and controlling the ball in possession. We had some big chances and their goalkeeper was amazing. Out of possession, we were not on the field today."
On his five yellow cards in the Premier League: "When we look at the decisions today, they were really poor so I think being emotional is part of it. I know the statistic but, in the end, emotions are part of the game."
Hear more from Hurzeler talking to BBC Radio Sussex on BBC Sounds
Matthew Howarth
BBC Sport journalist
Image source, Getty ImagesFabian Hurzeler fielded an attacking team at the City ground, restoring Georginio Rutter and Yankuba Minteh to an XI that also featured Joao Pedro, Danny Welbeck and Kaoru Mitoma – who was the subject of a failed bid from Saudi club Al-Nassr late in the transfer window.
Before the game, Hurzeler said he wanted to "dominate" Forest and there was no shortage of attacking intent from the visitors early on – but those efforts were undermined by a defensive horror show.
Morgan Gibbs-White and Anthony Elanga were given far too much space in the lead-up to Forest's first and third goals of the afternoon, while Gibbs-White also managed to outjump both Welbeck and Tariq Lamptey for the home side's second.
Hurzeler replaced Jack Hinshelwood, Mitoma and Pedro with Matt O'Riley, Simon Adingra and Diego Gomez at the interval, but if Brighton's fans thought things could only get better in the second half, they were wildly mistaken.
Elanga was allowed to dart into the penalty area unchallenged to set up Wood's second, while Lamptey can have few complaints at referee Simon Hooper's decision to point to the spot after dragging Gibbs-White to the floor just a few minutes later.
Verbruggen's stoppage-time clearance into the feet of Jota Silva summed up a truly miserable afternoon for Brighton, who suffered their heaviest league defeat since a 9-0 loss at Middlesbrough on the opening day of the 1958-59 Second Division season.
Image source, Getty ImagesThis was Brighton's heaviest league defeat since a 9-0 loss at Middlesbrough on the opening day of the 1958-59 season.
Lewis Dunk has scored seven own goals in the Premier League, with only Richard Dunne (10) putting through his own net on more occasions in the competition's history.
Since the start of their first Premier League campaign in 2017-18, Brighton have scored more own goals than any other side (19).
Were you at the game or following from elsewhere?
Have your say on Nottingham Forest's performance
What did you make of Brighton's display?
Come back to this page on Sunday evening to find a selection of your replies
