Neymar made a mistake leaving Barcelona and the club should do everything to bring him back, according to former player Rivaldo.
The Brazil superstar has been heavily linked with a return to the Catalan giants two years after he joined Paris Saint-Germain in a world-record €222 million (£200m/$246m) deal.
A delegation from Barca was reportedly in the French capital on Tuesday to discuss a deal , which would need to be completed before the transfer window closes on September 2.
Real Madrid have also been rumoured to be interested in the 27-year-old, but Rivaldo – who played for Barca between 1997 and 2002 – has urged his former side to act decisively and not allow another club to purchase him.