With only 12 months remaining on his Madrid contract, Varane has been allowed to join the Red Devils.
United are reported to be paying a fee of £42.7million (€50m) to secure the transfer, which is subject to a medical and to player terms being finalised.
Ighalo is joining United on loan for the rest of the season but there is no option to buy in the deal, Omnisport understands.
United, who finally signed Bruno Fernandes for a fee of £46.5million (€55m) and a potential further £21.1m (€25m) in add-ons on Thursday, were eager to bring in a striker prior to the end of the transfer window.
With Marcus Rashford out injured, United were said to have had an approach for Josh King rebuffed by Bournemouth before turning their attention to Ighalo.
The Nigeria forward has spent the past three seasons in the Chinese Super League, scoring 10 league goals for Shanghai Shenhua last term after two prolific campaigns with Changchun Yatai.
But the 30-year-old will now bolster Ole Gunnar Solskjaer's attack, with United just managing to get a short-term loan deal completed before Friday's deadline.
An official announcement from United will come later, but it is understood all aspects of the deal have been agreed.
Ighalo has Premier League experience, having scored 16 goals for Watford in 55 top-flight appearances between 2015 and 2017.
Alvaro Morata has completed a return to Juventus on an initial one-year loan deal from Atletico Madrid, the clubs have announced.
World Cup winner Ozil, once Arsenal's record signing, had been excluded from Mikel Arteta's first-team plans this season and departs after seven and a half years with the Premier League club.
The former Germany midfielder was under contract until the end of the current campaign but reached an agreement for an early termination, clearing him to sign elsewhere.
Fener have now confirmed the arrival of Ozil, with Arsenal announcing the playmaker's departure on their official website.
In a statement in the Gunners' announcement, Ozil said: "I'd like to thank the club for this amazing journey over the past seven-and-a-half years.
"The support I have felt from the team and fans during my time here has been truly incredible and something I will always be grateful for.
"Together we won trophies for the first time in years and created memories that will last a lifetime.
"The Arsenal fans will forever remain in my heart. I'd like to thank Edu Gaspar for helping bring about a professional and dignified solution in the past few days, and I wish everyone at the club the best in their attempt to continue to bring Arsenal back to the top, where we belong."
Having joined from Real Madrid in September 2013, Ozil made 184 Premier League appearances for Arsenal, scoring 33 goals and contributing 54 assists.
He was a key part of Arsene Wenger's squad that finished second in the 2015-16 Premier League season, while he also started in the FA Cup final triumphs in 2014, 2015 and 2017.
However, the 32-year-old had increasingly become a peripheral figure in recent years, initially under former Gunners boss Unai Emery before being left out entirely by Arteta.
His final Arsenal appearance came on March 3, 2020, when he played 89 minutes in a 1-0 win over West Ham at Emirates Stadium.
Although he was twice named on the bench when the 2019-20 season resumed after the coronavirus-enforced break, the 32-year-old was an unused substitute against both Brighton and Hove Albion and Southampton in June.
"Mesut's achievements at Arsenal are undisputed," Arteta said. "It was a privilege to play alongside him and, more recently, coach him.
"His creativity and vision led to many goals during his time in the Arsenal shirt. Mesut was at the heart of many great moments for this club over the years, including those three FA Cup final wins.
"These successes will always be part of our history. We thank Mesut and wish him all the best with Fenerbahce."
The long pursuit of Sancho has resulted in a deal that Stats Perform understands will see United pay £72.9million (€85m) for Sancho, with no add-ons included within the deal.
It makes the 21-year-old the fourth most expensive signing in United's history, behind Paul Pogba, Harry Maguire and Romelu Lukaku.
He has signed until 2026, with United having the option to extend that agreement for another year.
United were keen on Sancho last year but could not drive through a deal at the time, with Dortmund reluctant to sell one of their chief assets.
However, they have now been persuaded to part company with a player who scored twice in their DFB-Pokal final win over RB Leipzig last season.
Sancho established a strong understanding with the much-coveted Erling Haaland while at Dortmund and now joins a United side who have ground to make up on neighbours Manchester City.
He will look to build a similar rapport with his Manchester United team-mates, having experienced the agony of losing the Euro 2020 final on penalties alongside Luke Shaw, Harry Maguire and Marcus Rashford.
Both Sancho and Rashford missed from 12 yards in the shoot-out as Italy prevailed after a 1-1 draw following extra time to deny England a first major title since the 1966 World Cup.
Having joined Dortmund in 2017, Sancho scored 50 goals and provided 57 assists in 137 appearances across all competitions for BVB.
It was City that Sancho left to join Dortmund in August 2017. He had come through the youth ranks with Watford initially before moving as a 14-year-old to the Etihad Stadium.
The balance of power in Manchester, and indeed in English football, remains weighted in City's favour after they won the Premier League title by 12 points from second-placed United last season.
United manager Ole Gunnar Solskjaer should have Sancho among his attacking options for his team's opening Premier League game against Leeds United at Old Trafford on August 14.
Sancho is the only player from Europe's top five leagues to have scored 10 goals or more and had at least 15 assists across all competitions in each of the past three seasons while playing at that high level.
United's penalty shoot-out defeat to Villarreal in the Europa League final in May means they remain without a major honour during Solskjaer's reign, which began when he was initially placed in caretaker control in December 2018 after Jose Mourinho was sacked.
Chelsea have completed the signing of defender Thiago Silva on a free transfer following his release by Paris Saint-Germain.
The pacy attacker will join up with the Premier League side, subject to international clearance, until the end of the season, though Brentford confirmed they then "expect to make the deal permanent for a club-record undisclosed fee", with reports suggesting that could be in the region of £22million (€25m).
Schade made his Freiburg debut in August 2021 and scored seven goals in 36 games for the Bundesliga club.
Speaking to the club's website after the announcement of the 21-year-old's arrival, Bees coach Thomas Frank said: "I think Kevin is a typical Brentford signing. He is a young, promising talent that we see a big potential in. We have been following him for a while and we think he will suit our style of play.
"He can play anywhere across our front three positions. He could play for us on either wing or as the central striker. He has great pace and is very promising in the way he runs behind defences.
"He is very good aerially, in both boxes, and can develop even more to be a real threat as an offensive option with his head.
"We like the way he presses when the team do not have the ball. He is willing to work very hard for his team. We see him as a player that could have a big potential to be a fine goalscorer and it is great to have him at Brentford. Our coaching staff are looking forward to working with him."
Brentford are enjoying another fruitful season in the Premier League, sitting ninth in the table after their 3-1 win against Liverpool on Monday.
Tonali is reportedly set to undergo his Milan medical on Wednesday ahead of his €35million switch from Brescia.
The 20-year-old midfielder, compared to Italian great Andrea Pirlo, had been tipped to join city rivals Inter following his exploits for Brescia.
But Tonali – a Milan fan as a child – seemingly announced his move to the Rossoneri before any official announcement.
Tonali uploaded a picture of himself as a child, wearing a Milan shirt via Instagram, with the caption: "Blame the fairytales".
A technically gifted midfielder renowned for his dribbling and passing abilities, Tonali scored once and registered seven assists for Brescia as they were relegated from Serie A in 2019-20.
Tonali – who ignored offers from Barcelona and Manchester United – had played a key role in Brescia's promotion to Italy's top tier in 2018-19.
Stefano Pioli's Milan have been strongly linked with both young attackers after they helped Brugge win the 18th league title in their history last season, while Premier League sides Arsenal and Leeds United are reportedly interested in one or both.
Belgium forward De Ketelaere scored 18 goals in all competitions during the 2021-22 season, while Netherlands international Lang added nine goals from out wide.
Both youngsters also featured in every one of Brugge's six Champions League outings last term, while Lang recently declared he wants to "take the next step" amid reports of the Rossoneri's interest.
Hoefkens, who played in the Premier League for West Bromwich Albion before moving into coaching, believes the pair are well-placed to earn their big moves in the future.
Asked what he told the two players in discussions about their futures, Hoefkens said: "I'd prefer you to stay.
"I try to talk to them casually, I want to know what's going on in their heads. But in my opinion, they are in a position of luxury.
"They are both incredibly loved and highly regarded here. As a club we will work on a transfer at the right time, but until then they just have to prepare as well as possible, for us or for their new team."
The Belgium winger left Atleti for the Chinese Super League in February 2018 but returned on an initial loan deal in January.
It was confirmed on Tuesday Atleti have now made Carrasco's signing permanent, with the 27-year-old penning a four-year deal at the Wanda Metropolitano.
Since linking back up with Diego Simeone's side, Carrasco scored once and provided four assists in 16 matches as Atleti secured Champions League football via a third-place finish in LaLiga.
During his first spell, Carrasco scored 23 times and added 17 assists in 124 games, while he has also netted six times in 41 appearances for his country.
Atleti are scheduled to face Granada in their 2020-21 season opener at the end of September.
Carvalhal has been out of work since leaving Celta Vigo in June, having kept the club in La Liga courtesy of a dramatic final-day win over Barcelona.
Prior to his stint in Spain, Carvalhal led Rio Ave to a club-record tally of 55 points in Portugal's Primeira Liga in 2019-20, before moving to Braga and winning the Taca de Portugal the following season.
The Portuguese coach is no stranger to the Middle East, having managed UAE Pro League outfit Al Wahda in 2022, and he would not necessarily be against a move to Saudi Arabia.
Saudi Arabian clubs have spent heavily in the transfer market this year, acquiring the likes of Karim Benzema and Neymar after the country's Public Investment Fund took control of four of the league's biggest clubs.
Though many have expressed concern about the financial power of Saudi clubs and the potential for the league to act as a "sportswashing" vehicle for the state, Carvalhal would be open to a move if presented with an attractive project.
"We never know. We never know. I have said that if the project is structured, let's see," Carvalhal told Stats Perform at the Thinking Football Summit when asked if he would manage in the league.
"It has not been a long time. If the project is to buy good players, with good coaches and also to develop youth football, if there are these kinds of projects in the future, I believe they can do something important.
"I remember China six years ago or seven years ago, they bet with very good coaches, very good players and after one moment they decided, 'no, we don't want this anymore, we are spending too much money', and they finished.
"It's over to everybody [in Saudi Arabia], let's see if this is consistent, if it will be here for 15 or 20 years.
"It is very welcome what they are doing – if it's something circumstantial. It's something that we don't know [yet]. "
Carvalhal's Celta side was built largely around the talents of Veiga, who scored twice as they upset Barcelona to clinch survival back in June.
Veiga was linked with Serie A champions Napoli before opting to join Al-Ahli, who also signed Riyad Mahrez, Roberto Firmino, Edouard Mendy, Allan Saint-Maximin and Franck Kessie in the recent window.
Carvalhal is proud to have played a role in Veiga's development, highlighting the way his move brought much-needed funds to Celta.
"Gabri Veiga for Celta Vigo in the B team was like a striker, then we decided to put him in the second midfielder [role] because the way that he plays there, he can score goals and give assists," he said.
"It was a big challenge for him because he started as a striker and after with us, we played with two midfielders, and he was one of the midfielders.
"He has improved to another level in this kind of position, with the goals and breaking lines.
"Of course, when he finished the season and we saw that big clubs wanted him, he moved to Saudi Arabia as an option.
"Big money came into the club, of course. We are very proud and very satisfied about everything."
Celta have four points from five matches under Carvalhal's successor Rafael Benitez, who has become the first coach in the club's history to lose his first three home league games at the helm.
Reinier has been linked with a €30million move from Flamengo this month, and it is said the teenager will sign for Madrid after his 18th birthday on January 19.
However, Raul, who works with Madrid's young talents in the reserve team, suggested he was unaware of an imminent announcement.
"I can't tell you anything because I don't know anything," Raul said after Castilla's 2-1 defeat to Melilla.
"You will have to ask the club or other people. Nobody has told me anything about this case."
Reinier scored six goals in 14 appearances in Brazil's Serie A last year.
Cavani is out of contract in June and the Uruguay international has been linked with a move away from PSG following his failed transfer to Atletico Madrid in January.
The 33-year-old – PSG's all-time leading goalscorer – has also reportedly emerged as a target for new MLS franchise Inter Miami.
But Bermudez believes Boca, where club legend Juan Roman Riquelme is now vice-president, can lure the PSG forward to Buenos Aires.
"Knowing Riquelme and the distance to [former Uruguay international Diego] Forlan, and knowing the category of Cavani, hopefully it will be very soon," Bermudez told Radio Cooperativa.
"He would give us a great hand and be very supportive. I think he wants to come to Boca."
Bermudez added: "If he comes it is for a real desire and the signs are clear."
Prior to the postponement of Ligue 1 and football due to coronavirus, Cavani had scored seven goals across all competitions in 2019-20.
Cavani has called Paris home since swapping Napoli for PSG in 2013.
Manchester United, Milan and Paris Saint-Germain are among the major European outfits who are due to farewell high-profile players when free agency comes into force on June 30.
Domestic leagues across the world appear increasingly likely to run beyond that deadline, meaning sides up and down the divisions could be forced to renegotiate deals beyond the typical expiry date.
It remains to be seen how governing bodies will approach the unfamiliar territory but Edinson Cavani, Mario Gotze and Zlatan Ibrahimovic will be watching closely like dozens more across Europe's top five leagues.
These are the stars and solid supporting cast members whose contract situations are worth monitoring in England, France, Germany, Italy and Spain.
LaLiga
Athletic Bilbao: Aritz Aduriz (retiring), Benat, Mikel San Jose
Atletico Madrid: Antonio Adan
Espanyol: Ander Iturraspe
Granada: Roberto Soldado
Real Valladolid: Hatem Ben Arfa
Sevilla: Ever Banega (joining Al Shabab at end of contract), Nolito
Valencia: Ezequiel Garay
Villarreal: Santi Cazorla
Premier League
Bournemouth: Ryan Fraser
Burnley: Joe Hart
Chelsea: Olivier Giroud, Pedro, Willian
Liverpool: Adam Lallana, Nathaniel Clyne
Manchester City: David Silva (confirmed he will leave at end of contract)
Manchester United: Nemanja Matic, Timothy Fosu-Mensah, Odion Ighalo (loan ends)
Newcastle United: Matty Longstaff
Tottenham: Jan Vertonghen, Japhet Tanganga
Serie A
Atalanta: Jose Luis Palomino
Hellas Verona: Fabio Borini
Inter: Ashley Young
Juventus: Gianluigi Buffon
Milan: Lucas Biglia, Giacomo Bonaventura, Zlatan Ibrahimovic
Napoli: Jose Callejon, Dries Mertens
Bundesliga
Bayer Leverkusen: Charles Aranguiz
Borussia Dortmund: Mario Gotze, Lukasz Piszczek
Hertha Berlin: Salomon Kalou
Schalke: Benjamin Stambouli
Wolfsburg: Robin Knoche
Ligue 1
Lille: Loic Remy
Monaco: Jemerson
Nice: Walter Benitez, Arnaud Lusamba
Paris Saint-Germain: Edinson Cavani, Thomas Meunier, Tanguy Kouassi, Layvin Kurzawa, Thiago Silva
Ceballos is on a season-long loan at the Premier League club but is contracted with Madrid until 2023.
However, the nine-time Spain international is still eager to succeed with the LaLiga giants, having arrived from Real Betis three years ago.
"I am a Real Madrid player … and any player in the world would like to play for Real Madrid," Ceballos told TVE on Wednesday.
"I have a contract with them for three more years and they are the ideal team to succeed."
Ceballos is preparing for a return to Premier League action, with top-flight clubs in England returning to training this week.
The 23-year-old revealed Arsenal players had returned no positive tests for coronavirus.
"We passed the tests and the truth is that the whole team has tested negative," Ceballos said.
Ceballos, 23, joined the Premier League side on a season-long loan in July, and he made 24 appearances before the campaign was suspended due to the coronavirus pandemic.
The nine-time Spain international is contracted at Madrid until 2023 and he is eager to take his chance with the LaLiga giants.
"I am happy and I have a contract with Real Madrid," Ceballos told Deportes Cuatro on Wednesday.
"I am 23 years old, I have not passed the rice. Now I feel much more a player and I am prepared for any challenge that comes my way."
Ceballos joined Madrid from Real Betis for a reported €18million in July 2017.
The long-serving midfielder has made over 600 appearances in a hugely successful career for the Hoops since his move from Hibernian in 2007, winning 10 Premiership titles and 12 domestic cups with the Glasgow giants.
Former Scotland skipper Brown, 35, is coming to the end of his time at Celtic Park, though, after agreeing terms on a two-year deal with Aberdeen in a new era under Stephen Glass.
"There is no doubt I had a lot to deliberate when deciding my next steps, particularly after enjoying fourteen successful years at Celtic," he said.
"However, the opportunity to join Aberdeen, a club entering an exciting new period with my former team-mate Stephen now at the helm, was one I couldn't pass up.
"Once this season concludes, I'm looking forward to joining Stephen, the playing and coaching staff and everyone at Aberdeen FC. I am totally committed to the challenge that lies ahead in meeting the ambitions of the club and its fans.
"I still feel I have got a lot to give, not only on the pitch, but in a broader capacity as I embark on my coaching journey. I will be relentless in my quest for success for Aberdeen."
Glass was named as Dons manager on Tuesday after the dismissal of Derek McInnes.
Anselmino, who made 10 appearances for Boca in all competitions last season, has signed a seven-year deal but will return to Argentina on loan for the 2024-25 season.
The central defender scored once in their Copa Sudamericana triumph over Trinidense in April, but struggled for much of the campaign with injury.
Anselmino becomes Chelsea's fourth teenage signing of the transfer window following the arrivals of Marc Giui (18), Caleb Wiley (19) and Omari Kellyman (19).
Enzo Maresca has now welcomed eight new faces through the doors of Stamford Bridge, with Atletico Madrid's Samu Omorodion also linked with a move to the Blues.
Chelsea conclude their pre-season preparations this weekend in SW6 against Inter before taking on Manchester City in their opening game of the Premier League season.
The Blues have splashed a reported £35million (€40m)to land the England youth international, who spent time in the academies of London rivals Crystal Palace and Tottenham before moving to the Netherlands.
Madueke has signed a seven-and-a-half year deal at Stamford Bridge, with the Blues having the option to extend that by a further 12 months.
"I'm really pleased to sign with one of the best clubs in the world in Chelsea," Madueke told his new club's official website upon confirmation of the deal on Friday.
"To return to England and play in the Premier League is a dream for me and my family and I can’t wait to get started.
"I am excited for what the future holds, the owner's vision for the future and to be at a club like this and winning at the highest level."
Chelsea's want for Madueke has persisted despite the mega-money deal to land Mykhaylo Mudryk from Shakhtar Donetsk, as well as their loan deal for Joao Felix, while he was reportedly a player of interest to boss Graham Potter during his time with Brighton and Hove Albion.
Having supposedly seen approaches earlier in the window rebuffed, Chelsea returned to secure a deal to extend their spending spree under Todd Boehly.
Madueke has made only five appearances in the Eredivisie for PSV this season, scoring once.
PSV sold star player Cody Gakpo to Liverpool in December, and it had seemed that 20-year-old Madueke would be the natural replacement for the Netherlands forward.
Chelsea's busy transfer window has seen Benoit Badiashile, Andrey Santos and David Datro Fofana signed on a permanent basis, with Joao Felix joining from Atletico Madrid until the end of the season and Mudryk arriving from Shakhtar.
Chiesa is a player in demand following his exploits for Fiorentina. Juventus and Inter are reportedly interested, as well as Premier League giants Manchester United and Chelsea.
The 22-year-old Italy international, who emerged from Fiorentina's youth system in 2016, had managed six goals and three assists in 23 Serie A appearances prior to the coronavirus pandemic halting the season.
Fiorentina owner Rocco Commisso has already said he is open to selling Chiesa if the forward wants to leave the Viola, yet Diamanti has some advice for his countryman.
Ex-Italy international Diamanti, who played for Fiorentina across two loan spells and is now captain of A-League side Western United in Australia, told Stats Perform: "If I were Chiesa I would think twice before leaving Fiorentina.
"Commisso came with a lot of enthusiasm and plan and if I were Federico Chiesa I would think twice before leaving this Fiorentina with a new ownership."
American billionaire Commisso completed his takeover prior to the 2019-20 season, buying Fiorentina from the Della Valle family, having failed to land a controlling stake in Serie A rivals Milan.
Commisso's arrival led to the signing of high-profile free agent and former Bayern Munich star Franck Ribery but it has been a topsy-turvy campaign in Florence.
Fiorentina sacked head coach Vincenzo Montella in December and the team were 13th, five points above the relegation zone before the season was suspended.
"It is always hard [at the beginning]," Diamanti, who has also played for West Ham, Atalanta, Watford, Bologna and Chinese powerhouse Guangzhou Evergrande, said. "You risk to make a bit of confusion.
"He [Commisso] invested a lot, brought in many players. They had some problems despite the good start and were forced to sack the manager.
"So far this first season has been tough although the league isn't over yet. It has been tough, but you can see they laid the foundations for the future."