Neymar, who is recovering from a foot surgery after an injury in February, left Barcelona last summer after Paris Saint-Germain paid a record transfer fee of 222 million euros.
The 26-year-old is reportedly unhappy in France and has been linked with Manchester United, as well as a shock move to Real Madrid.
Neymar's former teammate Messi, in an interview with Argentine TV channel TyC Sports, said, "It would be bad, because of everything he means to Barcelona".
Despite his 14th season at Barcelona coming to and end, the Argentine legend has zero desire to wear any other shirt.
'And on a football level, it would make Madrid much stronger than they already are'.
"The Real Madrid squad completed their first training session of the week as preparations ahead of Saturday's La Liga encounter against Villarreal at the Estadio de la Cerámica (8:45pm CEST) got under way", the statement said. Every year I fight to win everything.
Following his terrific campaign, a section of football pundits has believes he reached the status of Ronaldo and Messi, with some even claiming that he will be a deserving victor of this year's World's Best Player gong. I do not need change.
Nevertheless, the Reds have qualified for the Champions League, regardless of the result in Kiev for the Champions League final.
This summer Salah has another opportunity to demonstrate his talent on the big stage as he represents Egypt at the World Cup. "It's what we all want".
Teacher suspended over 'relationship' with boy, 17, is shot dead in driveway
But investigators believe DelTondo knew her assailant, and that the evidence will show her murder was "a crime of passion". Reportedly, her name was sometimes misspelled as "Rachel" in certain media publications concerning the story.