Rumours have circulated today that PSG and Brazil defender David Luiz is set to make a shock switch back to former club Chelsea in a deal worth an alleged £32million.
The controversial centre-back left the south west London club for the French capital back in 2014 for the astronomical fee of £50million - a world record fee paid for a defender.
Luiz was a very much a marmite sort of player during his tenure at Stamford Bridge - adored by some and yet detested by others. His mixture of classy play out from the back and flying free-kicks combined with calamitous defending and horrendous inconsistency saw him create a huge divide between the Chelsea faithful.
Many were pleased to see the back of him, while others thought they had let go of a player who could go on to become a real star on the world stage.
His time in France has proven little however, with PSG having run riot in a relatively uncompetitive league yet still failing to make real waves on the European stage. Luiz has made over 80 appearances in his two seasons in France, and has scored eight goals along the way.
One thing is for sure however, it isn't good reading that the French champions are prepared to part way with a player they paid a world record fee for a mere two seasons ago.
We think it's a deal destined to go wrong, so here are five reasons we believe David Luiz back to Chelsea could be just about the worst of the summer...
Not a Centre Back
Chelsea have recruited in both attack and midfield this summer so far, having signed both Michy Batshuayi and N'Golo Kante from Marseille and Leicester City respectively.
It is well known the Blues are in need of defensive reinforcements with Kurt Zouma out and John Terry on the verge of retirement - so signing a player notorious for his defensive instability makes little to no sense.
Luiz's best days as a Chelsea player came when he played in midfield, but it is unlikely he can force Nemanja Matic, Cesc Fabregas or new man Kante out of the side.
Antonio Conte
New Chelsea boss Antonio Conte has been famed for his defensive stability over the years, leading his former club Juventus to four consecutive Serie A titles built upon the foundation of a solid back three of Giorgio Chiellini, Leonardo Bonucci and Andrea Barzagli.
All three of those players were no-nonsense, hardened defenders who worked as one unit to make life difficult for opposing strikers.
David Luiz can be seen as the anti-Chiellini (or Bonucci/Barzagli) - reckless, un-composed and certainly not a 'team' player. Conte and Luiz are a match made in hell.
A Step Backwards
While Luiz was part of Chelsea's incredible Champion's League success of 2011-12, and again the Europa League success of the following season, he failed to retain any domestic honours besides the FA Cup during his four seasons at Stamford Bridge.
The season directly after Luiz left the club after four seasons title-less in the Premier League, Chelsea went on to regain their crown in style under the returning Jose Mourinho.
Their improved defensive stability was a huge factor in that success, so re-signing a player who contributed to Chelsea's poor league record between 2010 and 2014 would be a step in the wrong direction.
No Improvement
Many expected the Brazilian defender to go on to new heights when he joined PSG in the summer of 2014, but the opposite has almost happened.
While performing well in Ligue 1, Luiz was part of the calamitous 2014 World Cup campaign for Brazil and was furthermore left out of the squads for both the 2016 Copa America and Olympics - a tournament in which Brazil went on to win gold in front of their home nation.
His performances in Europe have given little to admire also, with Thiago Silva and Marquinhos more often than not chosen for the big occasions.
No Hard Feelings ....
Luiz famously celebrated his goal on his return to Stamford Bridge - a goal that sent his former side out of the Champion's league on away goals after a 2-2 draw in London.
Despite apologising for the celebration, it is not a moment many Chelsea fans will be quick to forget, and those feelings of bitterness towards the former Brazil international will still run deep throughout the Bridge.