Paris St-Germain moved 16 points clear at the top of Ligue 1 after an emphatic victory over bottom club Troyes at an emotional Parc des Princes.
There was a minute's silence while fans and players sang La Marseillaise - the French national anthem - before PSG's first home game since 130 people were killed in the Paris attacks.
PSG scored through Edinson Cavani, Zlatan Ibrahimovic's penalty, Layvin Kurzawa and Jean-Kevin Augustin.
Thomas Ayasse got Troyes' consolation.
Laurent Blanc's side are well placed to claim a fourth successive league title after nearest rivals Lyon slipped to a 4-2 home defeat against Montpellier on Friday.
A ninth successive Ligue 1 win leaves PSG with 41 points from a possible 45, while in contrast Troyes remain bottom of the table, without a win in 15 league games and nine points from safety.
PSG had warned fans to expect "exceptional security measures" before the game in the wake of the 13 November attacks.
Away fans are banned from top-flight matches in France until mid-December.
PSG said it was "imperative" home fans attending Saturday's game brought at least one form of identification "in order to make it through the security checks on the way into the ground".