Kylian Mbappe had a goal ruled out for offside while a subdued Lionel Messi also failed to find the target as Paris Saint-Germain's march towards another Ligue 1 title was slowed on Sunday after a 2-0 defeat at home to Rennes.
Marseille's 2-1 win away to Reims saw them close the gap on French leaders PSG to seven points with 10 games remaining. Mbappe thought he had struck his 20th Ligue 1 goal of the campaign before it was chalked off.
Karl Toko-Ekambi put Rennes in front with a magnificent strike right on half time. Arnaud Kalimuendo made it 2-0 three minutes after the restart against his former club, as PSG – faced with a defensive injury crisis – slumped to a first home league defeat of the campaign.
It is the Parisians' fourth Ligue 1 loss this season, all of them in 2023, and the second time they have been beaten by Rennes.