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Why 2021 transfer window will remain the craziest in football history

Ernest Sunday
By Ernest Sunday

Freelance sports writer with great passion for football, Academic content writer and Lifestyle Blogger

The biggest moments of 2021 football transfer window and why it will never be forgotten in football history

Why 2021 football transfer will remain the best transfer in history

Over many years football transfer window has been one of the exciting moments in football where different clubs buy players from other football clubs worldwide to strengthen their squads ahead of a new season.

Football fans have had many awesome experiences of these transfer window seasons. They have enjoyed seeing new talented players join their clubs every new season, and that has been one of the biggest moments football always produce every season.

The likes of Barcelona, Manchester United, Real Madrid, Chelsea, Paris Saint-Germain, Liverpool, Arsenal, Bayern Munich and many others have signed many talented players every transfer window, which has made their fans enjoy the transfers in football.

Having seen so many talented players join top clubs in the past years of transfer windows, the 2021 transfer window has beaten every other transfer window in football history with many unexpected transfers to different top clubs.

Super talented players like Lionel Messi, Cristiano Ronaldo, Sergio Ramos, Memphis Depay, David Alaba and many other top talented players surprisingly left their clubs unexpectedly to join new clubs.

Since the end of the transfer window, these transfers have been talked about by the whole pundit and football fans.

Aside from all these big names leaving their clubs, let us look at the amazing moments of the 2021 football transfer window and why it is the craziest and most talked-about in football history.

1.0 Lionel Messi's shocking transfer to Paris Saint-Germain

No one would ever imagine Lionel Messi playing for another football club aside from Barcelona. Lionel Messi is regarded as one of the best if not the best football player the world has ever produced.

Messi, who graduated from Barcelona's academy before making his debut in Spanish La Liga, has always carried Barcelona on his shoulder since he emerged.

Lionel Messi made his Ligue 1 derby for PSG wearing the number 30 jersey he first wore at his former club Barcelona

The super talented player has helped Barcelona win many trophies in football, including the UEFA Champions League and Spanish La Liga titles.

Barcelona has always been regarded as the home of the sixth-time Balon d'Or winner, and no club has ever hoped to acquire the service of Lionel Messi.

Every football pundit has always talked about how cost Lionel Messi could be if sold to another club, with some mentioning the huge millions of pounds it will take to acquire his service, not to talk of his high salary.

2021 football transfer window got everyone unaware as Lionel Messi left Barcelona to join Ligue 1 giants Paris Saint-Germain not in a huge amount of money this time but a free transfer.

Messi transfer has created history in the football transfer window as it became the first time Lionel Messi will wear another team jersey on the pitch since his debut many years ago.

Lionel Messi Left Barcelona as a superstar breaking many Spanish and European records. He left as Barcelona's all-time highest goal scorer, something every Barcelona's fan will always carry in their hearts.

2.0 Cristiano Ronaldo's unimaginable return to Manchester United

After eleven years of leaving Manchester United for Real Madrid, Cristiano Ronaldo made a shocking late return to Old Trafford in the 2021 transfer window.

Ronaldo's return to Manchester United was surprising to many football fans after a serious discussion over a move to Manchester City collapsed due to abuse from United fans for such a transfer.

Cristiano Ronaldo already gearing to make his second Champions League debut for Manchester United

Many pundits believed that Ronaldo's approach to Manchester City was a way to draw United attention, and that worked for him and his agent Mendes.

Ronaldo's return to Manchester United marked it the first time two of the most talented footballers in football history moved away from their clubs at the same time.

His return also marked one of the greatest home returns, attracting the greatest attention and singing in football history. According to many United fans, no one has imagined such a moment will come after so many years.

3.0 2021 transfer window with the craziest free transfer in football history

Football transfer has had many moments where players left their clubs to join another club on a free transfer (no transfer fee). For many, it is one of the best businesses you can get in transfer windows; no payment to the club a player is leaving, only players' salaries are discussed.

Even though a free transfer goes without a fee, it has only had few talented players leave their clubs on a free transfer in a particular season. Robert Lewandowski, Andrea Pirlo, Raul, Jay-Jay Okocha, Dani Alves, and others left their clubs on a free transfer in different transfer windows.

2021 transfer window produced the craziest free transfer that has never happened in football history with so many talented players leaving top clubs for free

2021 football transfers window has made a difference, so many top talented players surprisingly left their clubs on a free transfer to join other clubs. The 2021 transfer window is the first to see many superstars leave their clubs on a free transfer.

Lionel Messi, Sergio Ramos, Kun Aguero, Serge Aurier, Georginio Wijnaldum, Gianluigi Donnarumma, Memphis Depay, David Alaba and many other talented players left the clubs on a free transfer to other clubs in 2021.

With such big names in the 2021 free transfer list, the 2021 transfer window created history as the craziest transfer ever in football history.

4.0 PSG's 2021 transfer business, the best transfer ever in football history

Paris Saint-Germain has done the best business in football history in the 2021 transfer window. Under the club's CEO Nasser Al-Khelaifi the clubs did the best transfer in the 2021 transfer window.

At the beginning of the 2021 transfer window, PSG signed talented right-back Achraf Hakimi from Inter Milan for a fee of €70m, the club's most expensive transfer of 2021.

PSG's additional squad in the 2021 season are unbelievable talented players that could help them fight for a Champions League title

The greatest transfer in the club's 2021 transfer business is the free signing of Lionel Messi from Barcelona, Sergio Ramos from Real Madrid, Gianluigi Donnarumma from AC Milan and Georginio Wijnaldum from Liverpool.

These transfers have been regarded as the best transfer business ever, getting such huge talents on a free transfer at the same season, something unimaginable in football.

The club also completed the signing of Danilo Pereira from FC Porto for a fee of €16m and Nuno Mendes for a loan fee of €7m with options to buy.

In all these transfers, Paris Saint-Germain only spent €83m on the 2021 transfer but signed many huge talents, which can cost hundreds of millions of pounds to get and that has made the club's transfer the best in football history.

5.0 Barcelona's difficulty in registering new signings attracting pay cut from senior players

In the 2021 transfer window, Spanish giant Barcelona watched the club's all-time best player Lionel Messi leave Camp Nou over a reported salary dispute.

Messi left for PSG when Barcelona gave him late information that they could not meet his demands after agreeing with the club to sign a new contract.

Messi's departure was a shocking announcement to the football world that never imagined that to happen.

Despite Messi departure from Barcelona, the club did some good business in the transfer market bringing in Sergio Aguero from Manchester City and Memphis Depay from Lyon on a free transfer.

Barcelona was heavily affected by the COVID-19 pandemic last year and had no choice but to sell some of their players before they could register their new signings

The club also signed centre defender Eric Garcia from Manchester City on a free transfer and Luuk de Jong from Sevilla on a loan transfer.

Despite signing all these players, it was difficult for Barcelona to register its new signings ahead of the season without selling some players and that made them put up some players for sale.

Emerson Royal and Miralem Pjanić were sold to Tottenham and Besiktas even after refusing to go out from Barcelona.

The refusal of some of these players made Barcelona's senior players like Gerard Piqué, Jordi Alba and Sergio Sergio Busquets take a pay cut for the club to register new signings.

It was a crazy scene in the 2021 transfer window as a top club like Barcelona signed players and found it difficult to register them; who can imagine that?

In the late transfer, Barcelona also loaned out one of its most expensive players ever, Antoine Griezmann, back to his former club Atletico Madrid, another crazy moment witnessed in the 2021 football transfer window.

6.0 Pep Guardiola failed to reunite with Lionel Messi in the 2021 transfer window

Since moving to Manchester City, former Barcelona's manager Pep Guardiola has been looking for an opportunity to reunite with his former player Lionel Messi.

Messi has been linked to Manchester City for the last two seasons when he declared his living in Barcelona. Everyone knew that Guardiola was desperate to get the super talented player back to his team in England.

Even though the hope of Messi leaving Barcelona collapsed, there were still rumours linking the Argentina captain to Guardiola's City.

Pep Guardiola missing on signing Lionel Messi was a big hit on City's plan to lift the Champions League title

In the 2021 transfer window, Guardiola signed Aston Villa's Captain Jack Grealish in a breaking transfer fee of €117m after giving up on the chance of getting Messi into his club.

Grealish transfer was good for City, who lost Kun Aguero on a free transfer to Barcelona; Grealish was a fine replacement for Aguero due to his great performance over the last three seasons.

The shocking moment for Pep Guardiola was when Barcelona announced the departure of Lionel Messi just some days after Manchester City signed Jack Grealish in a breaking transfer record.

Due to the cost of Jack Grealish, it was impossible to negotiate with Lionel Messi over a contract and salary.

7.0 Some of the transfers in 2021 that made it the craziest football transfer ever in history

Name of players

Clubs left

Current clubs


Lionel Messi



Free transfer

Cristiano Ronaldo


Manchester United


Jack Grealish

Aston Villa

Manchester City


Romelu Lukaku

Inter Milan



Jadon Sancho

Borrusia Dortmund

Manchester United


Raphaël Varane

Real Madrid

Manchester United


Achraf Hakimi

Inter Milan



Dayot Upamecano

RB Leipzig

Bayern Munich


Antoine Griezmann


Atletico Madrid

€10m loan fee

Gianluigi Donnarumma

AC Milan


Free tranfer

Ben White




Memphis Depay



Free transfer

Eduardo Camavinga

Stade Rennais

Real Madrid


Tammy Abraham


AS Roma


Martin Ødegaard

Real Madrid



Marcel Sabitzer

RB Leipzig

Bayern Munich


Nuno Mendes

Sporting CP


€7 loan fee

Saúl Ñíguez

Atletico Madrid


€5 loan fee

Emiliano Buendía

Norwich City

Aston Villa


Rodrigo de Paul


Atlético Madrid


Kurt Zouma


West Ham United


Leon Bailey

Bayer Leverkusen

Aston Villa

Georginio Wijnaldum