Neymar has been confirmed as the third Paris Saint-Germain player to contract COVID-19.
It was already known that Angel Di Maria and Leandro Paredes had contracted the virus.
"Three Paris Saint-Germain players have confirmed positive Sars CoV2 tests and are subject to the appropriate health protocol,” the Parisian giants confirmed on Wednesday
"All of the players and coaching staff will continue to undergo tests in the coming days."
Having been beaten in the Champions League final by Bayern Munich, PSG are due to resume their Ligue 1 season on September 10 against Lens.
Di Maria and Paredes had been on holiday in Ibiza with former team-mate Edinson Cavani.
L'Equipe confirmed on Wednesday that Neymar completed the trio of positive test results, having also been in Ibiza.
They may not be the last at the club to produce positive test results, as Marquinhos was also on the Balearic island in recent days.
RMC claim that he and his family returned two-days earlier than the others, and is currently awaiting the results of a test.
The game with Lens is in serious jeopardy now, as a match can be postponed if three cases are confirmed at a club in an eight-day span.
Even if the match does go ahead, then Neymar, Di Maria and Paredes will all miss it as they'll be required to self-isolate.
The trio will also have to skip Le Classique with Marseille at the Parc des Princes on September 13. The September 16 visit of Metz will also come too soon for a return.