Paris St-Germain lost at home in the league for the first time since May 2018 as they were beaten 2-0 by Reims.
The French champions beat Real Madrid 3-0 in the Champions League last week but looked a shadow of that side in this game, failing to truly test Reims goalkeeper Predrag Rajkovic.
Instead, Reims took the lead in the first half when Hassane Kamara headed home.
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‘s bicycle kick in injury time gave Reims a deserved win.
PSG remain top of Ligue 1 with 15 points from seven games, with Reims eighth on 11.
