The forward is unsettled at PSG and eager to return to the Camp Nou this summer, although any deal would be expensive and complicated.
But Luis, who left Atletico Madrid at the end of his contract this summer and is now a free agent, was in no doubt about how he wants the saga to unfold.
"I want him to end up at Barcelona," he told the Tiempo de Juego programme on Cadena COPE and Radio MARCA.
"Neymar is happy at Barcelona. I want him to have fun and to be by the side of Lionel Messi.
"I hope, for the good of Brazilian football, that Neymar goes back to Barcelona. But I don't think that will be easy."
LIST 13 players who left on terrible terms with their clubs
Now read...
ANALYSIS Why Arsenal should become a selling club once again – for their own good
DONE DEALS 7 intriguing transfers that have gone under the radar this summer
Manchester United report: Antony's future has already been decided after new comments from CEO
‘Slot hasn’t come in and changed everything, making it all about himself – it’s been about the players he’s inherited, getting the best out of a system he likes’: Liverpool manager impressing former players with personality and tactical approach
