The 21-year-old defender has attracted interest across Europe after impressing for RB Leipzig this season. Matthaus believes Upamecano should remain at German club for a bit longer.

Mamadou Sakho has revealed that he turned down Barcelona, Bayern Munich and Arsenal to join Liverpool. The defender joined Liverpool from Paris Saint-Germain in 2013 for £18million.

Everton are reportedlyinterested in signing Torino's Andrea Belotti this summer, with Manchester United and Napoli also pursuing the striker. 

RB Leipzig are yet to speak to clubs about in-demand striker Timo Werner, with Liverpool and Bayern Munich reportedly interested in a summer move for the prolific goalscorer.

Every now and again - but not often - a player will make the brave decision to move from his current club to their biggest rivals. Here, Sportsmail takes a look at ten transfers between rival clubs.

RB Leipzig striker Timo Werner looks to be edging closer to a move to the Premier League with reports claiming the Chelsea and Liverpool target has started taking English lessons.

Matches will continue behind closed doors with a maximum of 322 people in and around stadiums for top-flight Bundesliga matches and 270 for second-tier games.

Robben ended his playing career last summer and admits that, while he initially didn't miss football, he started to think about possibly playing again.

The highly-rated French centre-back has a £52m buyout clause at Leipzig, who are keen to sell him this year as opposed to losing him for free upon the expiration of his contract next summer.

With a permanent deal to Bayern currently unlikely, he Brazilian has been linked with a return to the Premier League and a move to Chelsea but Barcelona will not sell for less than £87m (€100m).

Klopp is on the verge of winning the Premier League title with Liverpool, but it won't be the charismatic German's first domestic league title, having stormed the Bundesliga with Dortmund.

KIT HOLDEN IN GERMANY: On Monday morning, the Bundesliga waited with bated breath for news out of Cologne. When it came, German football breathed a collective sigh of relief.

Chelsea manager Frank Lampard has insisted his players will need a proper pre-season as he wrestles with getting his side back to fitness for Project Restart.  

Super Tuesday is in full swing with voters hitting the polls to determine who will be the leading Democratic nominee to take on President Donald Trump during the Presidential elections.

The 50-year-old Friends star took to Instagram to pose with her 'I Voted' sticker - which many stars including Michelle Pfeiffer, Laura Dern and Jessica Biel did.

Bernie Sanders released a new TV ad Wednesday featuring a 'narration' from Barack Obama after Joe Biden's Super Tuesday sweep put the pressure on the Vermont senator's campaign.

Bernie Sanders learned Wednesday from a reporter during a press conference that Mike Bloomberg had dropped out of the Democratic primary race.

Comedian Louis C.K, whose real name is Louis Szekely, donated $2,800 to Joe Biden's campaign on March 4. It has since been refunded to Szekely, accused of sexual assaulting five women.

PETE JENSON IN SPAIN: LaLiga was heading for its most exciting conclusion in years. Even those who would benefit from drawing a line under the season with the table left as it is want it finishing properly.

Both Manchester clubs are long-term admirers of the Atletico star, who has a huge release clause in his current contract of €150million and recently helped knock Liverpool out of the Champions League.

Atletico Madrid are looking to ward off interest from Manchester United and Arsenal by giving Thomas Partey a new deal with a £93million release clause. 

Manchester United are making the most of the unforeseen break in the football season by drawing up a plan to sign Thomas Lemar during the summer transfer window. 

Atletico Madrid are set to make a summer move for Rangers striker Alfredo Morelos in a bid to solve their problems in front of goal. Atletico have scored just 31 goals in 27 league games this term.

Despite only joining inter Milan last summer, Diego Godin is no longer wanted by Antonio Conte after failing to adapt to the Italian's system after moving from Atletico Madrid.

PETE JENSON: Not for the first time in his career Diego Godin has been linked with a move to Manchester United the club he might have signed for in 2018.

Diego Godin famously turned down an opportunity to join Mourinho when he was United manager two years ago, instead choosing to sign a new contract with then-side Atletico Madrid.

PETE JENSON IN SPAIN: If Barcelona are the club most struggling with the financial consequences of the Coronavirus because of their huge over-spend, Atletico Madrid are not far behind them.

Atletico shared a black and white image of the youngster on their Twitter page with the caption: 'Atletico Madrid is mourning the passing of our U14 player Christian Minchola'.

Roma are reportedly interested in signing Atletico Madrid striker Diego Costa as the Italian side look to add to their depleted striking options for next season.

Sportsmail has taken a trip down memory lane to the 1999/00 season in Spain. Deportivo La Coruna claimed an unlikely triumph with Atletico, Sevilla and Real Betis all suffering relegation.

Thomas Partey is poised to sign a new contract with Atletico Madrid, according to reports in Spain. Arsenal and Manchester United had been monitoring the midfielder with view to a summer transfer.

The scout who discovered Antoine Griezmann says he has been saddened by his struggles at Barcelona. 

Manchester United 'are growing increasingly confident they could sign Saul Niguez in a club record £135million deal' as they look to replace Paul Pogba.

Cavani, who has been at the Ligue 1 champions since moving from Napoli in 2013, was heavily linked with a move to Spanish side Atletico Madrid in January but the potential deal fell through.

Liverpool council's director of public health has suggested the rise in coronavirus cases in the city may be influenced by the decision to allow the Reds' match against Atletico to take place.

Barcelona are set to let midfielder Ivan Rakitic leave the club for a fee of £17million this summer with Atletico Madrid leading the race for his signature, according to Marca.

Reports emerged over the weekend linking the Manchester United midfielder with a move to north London but the player himself wants to see out his current contract at Old Trafford.

Former Real Madrid, Barcelona and Atletico Madrid manager and Luton player Radomir Antic has died at the age of 71 after a long battle with pancreatitis.

Edinson Cavani has been linked with South American clubs such as Boca Juniors recently, but his mother Berta Gomez insists that he still wants to play club football in Europe.

Aguirre, who coached Atletico between 2006 and 2009, was initially surprised at the hefty price tag for the unproven 17-year-old, but realised Aguero's ability within the first few days of his arrival.

The former Atletico Madrid defender, who moved to Inter in the summer of 2019 on a free transfer, has struggled to be a consistent starter in Antonio Conte's defence this season.

The Premier League giants have been long-term admirers of the 25-year-old Spanish international but he has a release clause of £135million in his Atletico contract.

Edinson Cavani's contract at PSG is set to expire but the frontman is rejecting offers from South American clubs including Brazilians Flamengo to remain in Europe ahead of the 2022 World Cup

The Spanish FA have proposed the clubs they wish to take part in European football next term should the Spanish top flight fail to be completed, but it is set to cause huge controversy.

EXCLUSIVE: Premier League clubs are worried about receiving instalments of transfer fees worth over £100m due from European clubs due to the collapse of TV deals on the continent.

The 20-year-old has already made over 50 appearances for Valencia since making his first team debut as a 17-year-old back in 2017 and has been linked with a move to a host of top clubs.

A scientific adviser is interested to see whether there is a link between the number of coronavirus deaths in Liverpool and Spain after the Reds faced Atletico Madrid at Anfield in March.

The Portuguese star completed a £113million move to Atletico Madrid from Benfica last summer, but has struggled to hit the ground running in Spain and could be offered an escape route.

The midfielder is a top target for Ole Gunnar Solskjaer's side with the club prepared to bid up to £70million as well as offer him a huge salary increase.

The match has since received a huge amount of scrutiny after a huge crowd of 54,000 - with 3,000 fans arriving from Madrid - were allowed to attend the match, against the advice of the WHO.