Neymar, Angel Di Maria, Leandro Paredes and Keylor Navas have been included in Paris Saint-Germain's squad for Sunday's Ligue 1 clash with Marseille after a period of quarantine.
The quartet missed PSG's 1-0 loss to Lens in their opening game of the 2020-21 campaign last Thursday after contracting COVID-19 during the close season.
However, all four players have since returned negative tests and Thomas Tuchel revealed at his pre-match news conference that the quartet would be considered for selection if they came through training unscathed.
It has now been confirmed that attacking duo Neymar and Di Maria, plus midfielder Paredes and first-choice goalkeeper Navas, are part of PSG's 21-man squad for Le Classique.
Kylian Mbappe, Mauro Icardi and Marquinhos also returned positive tests last week and remain absent for the clash at the Parc des Princes.
Speaking on the eve of the match, Tuchel questioned why one of the standout fixtures in the Ligue 1 calendar was being staged so early in the campaign.
"I am surprised that such an important game is scheduled for the third match day," he told reporters.
"I think such a game should be scheduled for October or November when both teams have got into a rhythm.
"Everybody wants to win at their best level but it's not possible if it's only the second game in Ligue 1. Personally I don't understand the decision."