The Brazilian superstar left the Catalan giants in acrimonious circumstances back in the summer of 2017 and has spent the past three-and-a-half years with Paris Saint-Germain.
Neymar was linked with a return to the Catalan giants 18 months ago, but Barcelona were unable to raise the funds to finance a deal, much to the annoyance of Messi who felt the club did not do enough to try and complete a transfer.
The PSG star now appears to be more settled than ever in the French capital and if he is to team up with Messi again, it looks more likely that his dream would be realised at Parc des Prince than Camp Nou.
Messi’s current contract expires at the end of the season and although at this juncture it appears unlikely that he will sign a new deal, Koeman remains hopeful a resolution can be found.
‘We know Leo’s situation,’ he said ahead of this weekend’s match against Cadiz.
‘There’s only one person who can decide his future and that is Leo. I’m not interested in comments from the outside, but rather those from inside the club. We can’t control the outsiders, but from the inside it’s different.
‘As a club we have to try to have the best players here.’
The prospect of Messi renewing his commitment to Barcelona was dealt another blow on Thursday when interim president Carlos Tusquets claimed he would have sold the club’s star player last summer to help balance the books.
‘I don’t know about the club’s figures, it’s not my job, it’s a difficult situation, but for all clubs.
‘I’m not worried about the candidate who wins the Presidency elections. Until we know who he is, we don’t have to think about it.’