The Argentine has shocked the footballing world after handing in a transfer request at the Nou Camp.
It follows a number of decisions that have contributed to his unhappiness.
The first this season started when he told Barca chiefs not to sack Ernesto Valverde, only for them to go ahead with the decision.
Quique Setien came in, only to infuriate the 33-year-old after Los Cules were thrashed in the Champions League when Bayern Munich.
That saw the former Real Betis coach sacked and replaced with Ronald Koeman, who reportedly told Messi that he will no longer have any privileges with the squad.
That has turned out to be the final straw for Messi, who is desperate to leave the club he has been with his whole professional career.
However, Barca are pushing to keep the Argentina international and have the backing of La Liga.
But his father, Jorge, is looking to accelerate a move away from the club for his son and has been pictured boarding a private jet.
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It has been speculated that he could be on his way to Manchester to meet Pep Guardiola.
The Spaniard has a close relationship with Messi, who had his best spell under the Catalan during their time at Barcelona.
Manchester City have also been in contact with his family and are keen on wroking on a deal that would see Messi move to the Etihad.
A condition detailed in his Barca deal reveals that the six-time Ballon d'Or winner could leave the club if he wanted to for nothing, but that expired in June while both parties are on a collision course.
Messi believes the clause should be extended due to the fact that the Covid-19 crisis has decimated the footballing calendar.
A move to City would certainly be a surprise to the world, though if the Argentina international were to leave Barcelona the Etihad has been made a favourite among the bookies.